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Simplifying 7 + 3x = -3(4 + -5x) 7 + 3x = (4 * -3 + -5x * -3) 7 + 3x = (-12 + 15x) Solving 7 + 3x = -12 + 15x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15x' to each side of the equation. 7 + 3x + -15x = -12 + 15x + -15x Combine like terms: 3x + -15x = -12x 7 + -12x = -12 + 15x + -15x Combine like terms: 15x + -15x = 0 7 + -12x = -12 + 0 7 + -12x = -12 Add '-7' to each side of the equation. 7 + -7 + -12x = -12 + -7 Combine like terms: 7 + -7 = 0 0 + -12x = -12 + -7 -12x = -12 + -7 Combine like terms: -12 + -7 = -19 -12x = -19 Divide each side by '-12'. x = 1.583333333 Simplifying x = 1.583333333
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