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Simplifying 12 = 4(x + -7) + -2x Reorder the terms: 12 = 4(-7 + x) + -2x 12 = (-7 * 4 + x * 4) + -2x 12 = (-28 + 4x) + -2x Combine like terms: 4x + -2x = 2x 12 = -28 + 2x Solving 12 = -28 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 12 + -2x = -28 + 2x + -2x Combine like terms: 2x + -2x = 0 12 + -2x = -28 + 0 12 + -2x = -28 Add '-12' to each side of the equation. 12 + -12 + -2x = -28 + -12 Combine like terms: 12 + -12 = 0 0 + -2x = -28 + -12 -2x = -28 + -12 Combine like terms: -28 + -12 = -40 -2x = -40 Divide each side by '-2'. x = 20 Simplifying x = 20
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