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x+4=19-2(x)
We move all terms to the left:
x+4-(19-2(x))=0
We add all the numbers together, and all the variables
x-(-2x+19)+4=0
We get rid of parentheses
x+2x-19+4=0
We add all the numbers together, and all the variables
3x-15=0
We move all terms containing x to the left, all other terms to the right
3x=15
x=15/3
x=5
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