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Simplifying 31 + -3(x + 3) = 15x Reorder the terms: 31 + -3(3 + x) = 15x 31 + (3 * -3 + x * -3) = 15x 31 + (-9 + -3x) = 15x Combine like terms: 31 + -9 = 22 22 + -3x = 15x Solving 22 + -3x = 15x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15x' to each side of the equation. 22 + -3x + -15x = 15x + -15x Combine like terms: -3x + -15x = -18x 22 + -18x = 15x + -15x Combine like terms: 15x + -15x = 0 22 + -18x = 0 Add '-22' to each side of the equation. 22 + -22 + -18x = 0 + -22 Combine like terms: 22 + -22 = 0 0 + -18x = 0 + -22 -18x = 0 + -22 Combine like terms: 0 + -22 = -22 -18x = -22 Divide each side by '-18'. x = 1.222222222 Simplifying x = 1.222222222
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