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1.8(x-4.2)=x
We move all terms to the left:
1.8(x-4.2)-(x)=0
We add all the numbers together, and all the variables
-1x+1.8(x-4.2)=0
We multiply parentheses
-1x+1.8x-7.56=0
We add all the numbers together, and all the variables
0.8x-7.56=0
We move all terms containing x to the left, all other terms to the right
0.8x=7.56
x=7.56/0.8
x=9+0.36/0.8
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