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Simplifying 90 = 8x + -18 Reorder the terms: 90 = -18 + 8x Solving 90 = -18 + 8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8x' to each side of the equation. 90 + -8x = -18 + 8x + -8x Combine like terms: 8x + -8x = 0 90 + -8x = -18 + 0 90 + -8x = -18 Add '-90' to each side of the equation. 90 + -90 + -8x = -18 + -90 Combine like terms: 90 + -90 = 0 0 + -8x = -18 + -90 -8x = -18 + -90 Combine like terms: -18 + -90 = -108 -8x = -108 Divide each side by '-8'. x = 13.5 Simplifying x = 13.5
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