7x+8x=75.

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Solution for 7x+8x=75. equation: 



7x+8x=75.

We move all terms to the left:

7x+8x-(75.)=0

We add all the numbers together, and all the variables

7x+8x-75=0

We add all the numbers together, and all the variables

15x-75=0

We move all terms containing x to the left, all other terms to the right

15x=75

x=75/15

x=5

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