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Simplifying 90 = 4(5x + -2) + 30 Reorder the terms: 90 = 4(-2 + 5x) + 30 90 = (-2 * 4 + 5x * 4) + 30 90 = (-8 + 20x) + 30 Reorder the terms: 90 = -8 + 30 + 20x Combine like terms: -8 + 30 = 22 90 = 22 + 20x Solving 90 = 22 + 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. 90 + -20x = 22 + 20x + -20x Combine like terms: 20x + -20x = 0 90 + -20x = 22 + 0 90 + -20x = 22 Add '-90' to each side of the equation. 90 + -90 + -20x = 22 + -90 Combine like terms: 90 + -90 = 0 0 + -20x = 22 + -90 -20x = 22 + -90 Combine like terms: 22 + -90 = -68 -20x = -68 Divide each side by '-20'. x = 3.4 Simplifying x = 3.4
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