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-2(u-7)=5u+49
We move all terms to the left:
-2(u-7)-(5u+49)=0
We multiply parentheses
-2u-(5u+49)+14=0
We get rid of parentheses
-2u-5u-49+14=0
We add all the numbers together, and all the variables
-7u-35=0
We move all terms containing u to the left, all other terms to the right
-7u=35
u=35/-7
u=-5
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