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Simplifying 56 = -2(21 + -1x) + 4(x + -4) 56 = (21 * -2 + -1x * -2) + 4(x + -4) 56 = (-42 + 2x) + 4(x + -4) Reorder the terms: 56 = -42 + 2x + 4(-4 + x) 56 = -42 + 2x + (-4 * 4 + x * 4) 56 = -42 + 2x + (-16 + 4x) Reorder the terms: 56 = -42 + -16 + 2x + 4x Combine like terms: -42 + -16 = -58 56 = -58 + 2x + 4x Combine like terms: 2x + 4x = 6x 56 = -58 + 6x Solving 56 = -58 + 6x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6x' to each side of the equation. 56 + -6x = -58 + 6x + -6x Combine like terms: 6x + -6x = 0 56 + -6x = -58 + 0 56 + -6x = -58 Add '-56' to each side of the equation. 56 + -56 + -6x = -58 + -56 Combine like terms: 56 + -56 = 0 0 + -6x = -58 + -56 -6x = -58 + -56 Combine like terms: -58 + -56 = -114 -6x = -114 Divide each side by '-6'. x = 19 Simplifying x = 19
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