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3x/2+4x=21
We move all terms to the left:
3x/2+4x-(21)=0
We add all the numbers together, and all the variables
4x+3x/2-21=0
We multiply all the terms by the denominator
4x*2+3x-21*2=0
We add all the numbers together, and all the variables
3x+4x*2-42=0
Wy multiply elements
3x+8x-42=0
We add all the numbers together, and all the variables
11x-42=0
We move all terms containing x to the left, all other terms to the right
11x=42
x=42/11
x=3+9/11
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