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Simplifying 141 = -6x + -3(3x + -7) Reorder the terms: 141 = -6x + -3(-7 + 3x) 141 = -6x + (-7 * -3 + 3x * -3) 141 = -6x + (21 + -9x) Reorder the terms: 141 = 21 + -6x + -9x Combine like terms: -6x + -9x = -15x 141 = 21 + -15x Solving 141 = 21 + -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. 141 + 15x = 21 + -15x + 15x Combine like terms: -15x + 15x = 0 141 + 15x = 21 + 0 141 + 15x = 21 Add '-141' to each side of the equation. 141 + -141 + 15x = 21 + -141 Combine like terms: 141 + -141 = 0 0 + 15x = 21 + -141 15x = 21 + -141 Combine like terms: 21 + -141 = -120 15x = -120 Divide each side by '15'. x = -8 Simplifying x = -8
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