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50+14(50-x)+22x=990
We move all terms to the left:
50+14(50-x)+22x-(990)=0
We add all the numbers together, and all the variables
14(-1x+50)+22x+50-990=0
We add all the numbers together, and all the variables
22x+14(-1x+50)-940=0
We multiply parentheses
22x-14x+700-940=0
We add all the numbers together, and all the variables
8x-240=0
We move all terms containing x to the left, all other terms to the right
8x=240
x=240/8
x=30
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