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Simplifying 30 + -15x = (3 * 13 + -1x * 13) Multiply 3 * 13 30 + -15x = (39 + -1x * 13) Reorder the terms for easier multiplication: 30 + -15x = (39 + -1 * 13x) Multiply -1 * 13 30 + -15x = (39 + -13x) Remove parenthesis around (39 + -13x) 30 + -15x = 39 + -13x Solving 30 + -15x = 39 + -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. 30 + -15x + 13x = 39 + -13x + 13x Combine like terms: -15x + 13x = -2x 30 + -2x = 39 + -13x + 13x Combine like terms: -13x + 13x = 0 30 + -2x = 39 + 0 30 + -2x = 39 Add '-30' to each side of the equation. 30 + -30 + -2x = 39 + -30 Combine like terms: 30 + -30 = 0 0 + -2x = 39 + -30 -2x = 39 + -30 Combine like terms: 39 + -30 = 9 -2x = 9 Divide each side by '-2'. x = -4.5 Simplifying x = -4.5
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