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(x+4)+x=154
We move all terms to the left:
(x+4)+x-(154)=0
We add all the numbers together, and all the variables
x+(x+4)-154=0
We get rid of parentheses
x+x+4-154=0
We add all the numbers together, and all the variables
2x-150=0
We move all terms containing x to the left, all other terms to the right
2x=150
x=150/2
x=75
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