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Simplifying 90 + -7x = 11x + 20 Reorder the terms: 90 + -7x = 20 + 11x Solving 90 + -7x = 20 + 11x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11x' to each side of the equation. 90 + -7x + -11x = 20 + 11x + -11x Combine like terms: -7x + -11x = -18x 90 + -18x = 20 + 11x + -11x Combine like terms: 11x + -11x = 0 90 + -18x = 20 + 0 90 + -18x = 20 Add '-90' to each side of the equation. 90 + -90 + -18x = 20 + -90 Combine like terms: 90 + -90 = 0 0 + -18x = 20 + -90 -18x = 20 + -90 Combine like terms: 20 + -90 = -70 -18x = -70 Divide each side by '-18'. x = 3.888888889 Simplifying x = 3.888888889
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