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Simplifying 3(5 + 4) + -20 = 13x + -4 Combine like terms: 5 + 4 = 9 3(9) + -20 = 13x + -4 Multiply 3 * 9 27 + -20 = 13x + -4 Combine like terms: 27 + -20 = 7 7 = 13x + -4 Reorder the terms: 7 = -4 + 13x Solving 7 = -4 + 13x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13x' to each side of the equation. 7 + -13x = -4 + 13x + -13x Combine like terms: 13x + -13x = 0 7 + -13x = -4 + 0 7 + -13x = -4 Add '-7' to each side of the equation. 7 + -7 + -13x = -4 + -7 Combine like terms: 7 + -7 = 0 0 + -13x = -4 + -7 -13x = -4 + -7 Combine like terms: -4 + -7 = -11 -13x = -11 Divide each side by '-13'. x = 0.8461538462 Simplifying x = 0.8461538462
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