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x+3x+(x-58)=1131
We move all terms to the left:
x+3x+(x-58)-(1131)=0
We add all the numbers together, and all the variables
4x+(x-58)-1131=0
We get rid of parentheses
4x+x-58-1131=0
We add all the numbers together, and all the variables
5x-1189=0
We move all terms containing x to the left, all other terms to the right
5x=1189
x=1189/5
x=237+4/5
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