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Simplifying 7(2x) + -1(-4x) = 0 Remove parenthesis around (2x) 7 * 2x + -1(-4x) = 0 Multiply 7 * 2 14x + -1(-4x) = 0 Remove parenthesis around (-4x) 14x + -1 * -4x = 0 Multiply -1 * -4 14x + 4x = 0 Combine like terms: 14x + 4x = 18x 18x = 0 Solving 18x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '18'. x = 0 Simplifying x = 0
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