87+7x-4=90

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Solution for 87+7x-4=90 equation: 



87+7x-4=90

We move all terms to the left:

87+7x-4-(90)=0

We add all the numbers together, and all the variables

7x-7=0

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

7x=7

x=7/7

x=1

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