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Simplifying 13 = 3 + 5x + -2(-2x + 5) Reorder the terms: 13 = 3 + 5x + -2(5 + -2x) 13 = 3 + 5x + (5 * -2 + -2x * -2) 13 = 3 + 5x + (-10 + 4x) Reorder the terms: 13 = 3 + -10 + 5x + 4x Combine like terms: 3 + -10 = -7 13 = -7 + 5x + 4x Combine like terms: 5x + 4x = 9x 13 = -7 + 9x Solving 13 = -7 + 9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9x' to each side of the equation. 13 + -9x = -7 + 9x + -9x Combine like terms: 9x + -9x = 0 13 + -9x = -7 + 0 13 + -9x = -7 Add '-13' to each side of the equation. 13 + -13 + -9x = -7 + -13 Combine like terms: 13 + -13 = 0 0 + -9x = -7 + -13 -9x = -7 + -13 Combine like terms: -7 + -13 = -20 -9x = -20 Divide each side by '-9'. x = 2.222222222 Simplifying x = 2.222222222
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