15x-20=4+7x

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Solution for 15x-20=4+7x equation: 



15x-20=4+7x

We move all terms to the left:

15x-20-(4+7x)=0

We add all the numbers together, and all the variables

15x-(7x+4)-20=0

We get rid of parentheses

15x-7x-4-20=0

We add all the numbers together, and all the variables

8x-24=0

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

8x=24

x=24/8

x=3

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