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x+(x*3)=48
We move all terms to the left:
x+(x*3)-(48)=0
We add all the numbers together, and all the variables
x+(+x*3)-48=0
We get rid of parentheses
x+x*3-48=0
Wy multiply elements
x+3x-48=0
We add all the numbers together, and all the variables
4x-48=0
We move all terms containing x to the left, all other terms to the right
4x=48
x=48/4
x=12
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