2x+2(4x+21)=142

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Solution for 2x+2(4x+21)=142 equation: 



2x+2(4x+21)=142

We move all terms to the left:

2x+2(4x+21)-(142)=0

We multiply parentheses

2x+8x+42-142=0

We add all the numbers together, and all the variables

10x-100=0

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

10x=100

x=100/10

x=10

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