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# 7/8 +9/7 cant figure out this problem

Im trying to figure an easy way 2 answer this math problem ....im having difficulty with this problem...so if any 1 could help me breaking it down for me I would appreciate it

## Research, Knowledge and Information :

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### For the life of me, I can't figure this out...

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Cant figure out his problem. Make up a set of 8 numbers that simultaneously satisfy these ... 9 mode: 7 range: 15? Find answers now! ... Cant figure out his problem.

### Solve inequaity: -2x/7 -8>-9 Please need help, cant figure ...

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## Suggested Questions And Answer :

### 7/8 +9/7 cant figure out this problem

(7/8)+(9/7) =(49/56) +(72/56) =(49+72)/56 =121/56 =2.160714286

### I don't understand this?!?!!

3x^2+6x+1 3(x+1)^2-2 3(x^2+2x+1)-2

### its a systems of equations. please help solve. 3x+2y=4, y=2x+9

Problem: its a systems of equations. please help solve. 3x+2y=4, y=2x+9 i cant figure it out D: 1) 3x + 2y = 4 2) y = 2x + 9 Equation 2 already shows us the value of y, in terms of x. Substitute that into equation 1 and solve for x. 3x + 2y = 4 3x + 2(2x + 9) = 4 3x + 4x + 18 = 4 7x + 18 = 4 7x + 18 - 18 = 4 - 18 7x = -14 7x/7 = -14/7 x = -2 Now, solve for y. y = 2x + 9 y = 2(-2) + 9 y = -4 + 9 y = 5 Check them. 3x + 2y = 4 3(-2) + 2(5) = 4 -6 + 10 = 4 4 = 4 Answer: x = -2, y = 5

### How to solve 4x+3y=16 2x-3y=8

How to solve 4x+3y=16 2x-3y=8 Add them    4x + 3y = 16 +(2x -  3y =  8) ----------------------    6x        = 24 x = 4 Substitute into one of the equations 2(4) - 3y = 8 8 - 3y = 8 -3y = 8 - 8 -3y = 0 y = 0 / -3 y = 0 Substitute both values into the other eqation 4(4) + 3(0) = 16 16 + 0 = 16

### -n - 24 = 5 - n

You need to gather the knowns on one side of the equals (usually the right) and the unknowns on the other side. So we need to get the n's together. But there's a problem in your question, because you have -n on both sides of the equation. They would cancel one another out and you'd be left with an inequality -24 = 5, which is never true. Check out the question again. Let's assume it should have been  n-24=5-n. Transferring -n from right to left over the equals sign makes it +n, added to the n already there makes 2n. Similarly transferring -24 from left to right changes it to +24 added to 5 makes 29. So the equation becomes 2n = 29. Take the 2 from the left that was multiplying over to the right where it now divides and we get 29/2 = 14.5 or 14 and a half. Go back to the question and substitute this value for n and we get 14.5 - 24 = 5 - 14.5. Both sides come to -9.5 so the solution is correct. But you need to go back and get the right problem before you hand in your math assignment!

### how do i solve this problem 2x-1=x+4

2x  -  1  =   x  +  4                       combine like terms 2x  -  x  =   4  +  1                       simplify           x  =  5

### What is \$2.64 divided by 12?

Perhaps the question would be easier if you converted dollars to cents? 264 cents divided by 12 is 22 cents or \$0.22. Unit price just means the price of one object or item. You might see it quoted on an invoice, bill or estimate, or in shares.

### what is the value of f in the problem 0.64f-21.2=12.8

0.64x -21.2=12.8 0.64x=12.8+21.2=34 x=34/0.64 x=53.125

### 6x-5y=9 9x-7y=15

x= 4, y= 3 http://www.wolframalpha.com/input/?i=6x-5y%3D9%2C+9x-7y%3D15

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