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.5(3+x)=19
We move all terms to the left:
.5(3+x)-(19)=0
We add all the numbers together, and all the variables
.5(x+3)-19=0
We multiply parentheses
0.5x+1.5-19=0
We add all the numbers together, and all the variables
0.5x-17.5=0
We move all terms containing x to the left, all other terms to the right
0.5x=17.5
x=17.5/0.5
x=35
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