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Simplifying 13 + -3x = -7(1 + -1x) 13 + -3x = (1 * -7 + -1x * -7) 13 + -3x = (-7 + 7x) Solving 13 + -3x = -7 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 13 + -3x + -7x = -7 + 7x + -7x Combine like terms: -3x + -7x = -10x 13 + -10x = -7 + 7x + -7x Combine like terms: 7x + -7x = 0 13 + -10x = -7 + 0 13 + -10x = -7 Add '-13' to each side of the equation. 13 + -13 + -10x = -7 + -13 Combine like terms: 13 + -13 = 0 0 + -10x = -7 + -13 -10x = -7 + -13 Combine like terms: -7 + -13 = -20 -10x = -20 Divide each side by '-10'. x = 2 Simplifying x = 2
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