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0.4(6x+3)+3.6x=19.2
We move all terms to the left:
0.4(6x+3)+3.6x-(19.2)=0
We add all the numbers together, and all the variables
3.6x+0.4(6x+3)-19.2=0
We multiply parentheses
3.6x+2.4x+1.2-19.2=0
We add all the numbers together, and all the variables
6x-18=0
We move all terms containing x to the left, all other terms to the right
6x=18
x=18/6
x=3
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