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4+(-2x)=19
We move all terms to the left:
4+(-2x)-(19)=0
We add all the numbers together, and all the variables
(-2x)-15=0
We get rid of parentheses
-2x-15=0
We move all terms containing x to the left, all other terms to the right
-2x=15
x=15/-2
x=-7+1/2
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