x-8+4x=42

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Solution for x-8+4x=42 equation: 



x-8+4x=42

We move all terms to the left:

x-8+4x-(42)=0

We add all the numbers together, and all the variables

5x-50=0

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

5x=50

x=50/5

x=10

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