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Simplifying 7x + -1(-12x) = 0 Remove parenthesis around (-12x) 7x + -1 * -12x = 0 Multiply -1 * -12 7x + 12x = 0 Combine like terms: 7x + 12x = 19x 19x = 0 Solving 19x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '19'. x = 0 Simplifying x = 0
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