x+15+4x-12=90

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Solution for x+15+4x-12=90 equation: 



x+15+4x-12=90

We move all terms to the left:

x+15+4x-12-(90)=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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