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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