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Simplifying 5x + 4 + 2x = -1(x + -20) Reorder the terms: 4 + 5x + 2x = -1(x + -20) Combine like terms: 5x + 2x = 7x 4 + 7x = -1(x + -20) Reorder the terms: 4 + 7x = -1(-20 + x) 4 + 7x = (-20 * -1 + x * -1) 4 + 7x = (20 + -1x) Solving 4 + 7x = 20 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. 4 + 7x + x = 20 + -1x + x Combine like terms: 7x + x = 8x 4 + 8x = 20 + -1x + x Combine like terms: -1x + x = 0 4 + 8x = 20 + 0 4 + 8x = 20 Add '-4' to each side of the equation. 4 + -4 + 8x = 20 + -4 Combine like terms: 4 + -4 = 0 0 + 8x = 20 + -4 8x = 20 + -4 Combine like terms: 20 + -4 = 16 8x = 16 Divide each side by '8'. x = 2 Simplifying x = 2
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