4x=87-x

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Solution for 4x=87-x equation: 



4x=87-x

We move all terms to the left:

4x-(87-x)=0

We add all the numbers together, and all the variables

4x-(-1x+87)=0

We get rid of parentheses

4x+1x-87=0

We add all the numbers together, and all the variables

5x-87=0

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

5x=87

x=87/5

x=17+2/5

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