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Simplifying -87 = 5(7 + -4x) -87 = (7 * 5 + -4x * 5) -87 = (35 + -20x) Solving -87 = 35 + -20x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20x' to each side of the equation. -87 + 20x = 35 + -20x + 20x Combine like terms: -20x + 20x = 0 -87 + 20x = 35 + 0 -87 + 20x = 35 Add '87' to each side of the equation. -87 + 87 + 20x = 35 + 87 Combine like terms: -87 + 87 = 0 0 + 20x = 35 + 87 20x = 35 + 87 Combine like terms: 35 + 87 = 122 20x = 122 Divide each side by '20'. x = 6.1 Simplifying x = 6.1
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