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0.4(160+x)=106
We move all terms to the left:
0.4(160+x)-(106)=0
We add all the numbers together, and all the variables
0.4(x+160)-106=0
We multiply parentheses
0.4x+64-106=0
We add all the numbers together, and all the variables
0.4x-42=0
We move all terms containing x to the left, all other terms to the right
0.4x=42
x=42/0.4
x=105
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