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5x-0.2(x-4.2)=1.8
We move all terms to the left:
5x-0.2(x-4.2)-(1.8)=0
We add all the numbers together, and all the variables
5x-0.2(x-4.2)-1.8=0
We multiply parentheses
5x-0.2x+0.84-1.8=0
We add all the numbers together, and all the variables
4.8x-0.96=0
We move all terms containing x to the left, all other terms to the right
4.8x=0.96
x=0.96/4.8
x=0.96/4.8
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