8x+7x-20=100-5x

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Solution for 8x+7x-20=100-5x equation: 



8x+7x-20=100-5x

We move all terms to the left:

8x+7x-20-(100-5x)=0

We add all the numbers together, and all the variables

8x+7x-(-5x+100)-20=0

We add all the numbers together, and all the variables

15x-(-5x+100)-20=0

We get rid of parentheses

15x+5x-100-20=0

We add all the numbers together, and all the variables

20x-120=0

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

20x=120

x=120/20

x=6

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