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Simplifying 7 = 2x + 3(-4x) Remove parenthesis around (-4x) 7 = 2x + 3 * -4x Multiply 3 * -4 7 = 2x + -12x Combine like terms: 2x + -12x = -10x 7 = -10x Solving 7 = -10x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10x' to each side of the equation. 7 + 10x = -10x + 10x Combine like terms: -10x + 10x = 0 7 + 10x = 0 Add '-7' to each side of the equation. 7 + -7 + 10x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 10x = 0 + -7 10x = 0 + -7 Combine like terms: 0 + -7 = -7 10x = -7 Divide each side by '10'. x = -0.7 Simplifying x = -0.7
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