21-3(2x-1)+8x=42

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Solution for 21-3(2x-1)+8x=42 equation: 



21-3(2x-1)+8x=42

We move all terms to the left:

21-3(2x-1)+8x-(42)=0

We add all the numbers together, and all the variables

8x-3(2x-1)-21=0

We multiply parentheses

8x-6x+3-21=0

We add all the numbers together, and all the variables

2x-18=0

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

2x=18

x=18/2

x=9

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