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-7(-3-7x)=-224
We move all terms to the left:
-7(-3-7x)-(-224)=0
We add all the numbers together, and all the variables
-7(-7x-3)-(-224)=0
We add all the numbers together, and all the variables
-7(-7x-3)+224=0
We multiply parentheses
49x+21+224=0
We add all the numbers together, and all the variables
49x+245=0
We move all terms containing x to the left, all other terms to the right
49x=-245
x=-245/49
x=-5
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