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Simplifying 4x + -7(x + 20) = 85 Reorder the terms: 4x + -7(20 + x) = 85 4x + (20 * -7 + x * -7) = 85 4x + (-140 + -7x) = 85 Reorder the terms: -140 + 4x + -7x = 85 Combine like terms: 4x + -7x = -3x -140 + -3x = 85 Solving -140 + -3x = 85 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '140' to each side of the equation. -140 + 140 + -3x = 85 + 140 Combine like terms: -140 + 140 = 0 0 + -3x = 85 + 140 -3x = 85 + 140 Combine like terms: 85 + 140 = 225 -3x = 225 Divide each side by '-3'. x = -75 Simplifying x = -75
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