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Simplifying 2x + 18 + -9x + -11 = -90 Reorder the terms: 18 + -11 + 2x + -9x = -90 Combine like terms: 18 + -11 = 7 7 + 2x + -9x = -90 Combine like terms: 2x + -9x = -7x 7 + -7x = -90 Solving 7 + -7x = -90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -7x = -90 + -7 Combine like terms: 7 + -7 = 0 0 + -7x = -90 + -7 -7x = -90 + -7 Combine like terms: -90 + -7 = -97 -7x = -97 Divide each side by '-7'. x = 13.85714286 Simplifying x = 13.85714286
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