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5, x, plus, 9, equals, minus, 2, x, plus, 9
Solve for x
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5x+9+2x=9
Add 2x to both sides.
7x+9=9
Combine 5x and 2x to get 7x.
7x=9-9
Subtract 9 from both sides.
7x=0
Subtract 9 from 9 to get 0.
x=0
Product of two numbers is equal to 0 if at least one of them is 0. Since 7 is not equal to 0, x must be equal to 0.