Solve for x
x=0
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5x-20+7x=-20
Add 7x to both sides.
12x-20=-20
Combine 5x and 7x to get 12x.
12x=-20+20
Add 20 to both sides.
12x=0
Add -20 and 20 to get 0.
x=0
Product of two numbers is equal to 0 if at least one of them is 0. Since 12 is not equal to 0, x must be equal to 0.
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