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Simplifying 10 + -7x = -20 + -9x Solving 10 + -7x = -20 + -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. 10 + -7x + 9x = -20 + -9x + 9x Combine like terms: -7x + 9x = 2x 10 + 2x = -20 + -9x + 9x Combine like terms: -9x + 9x = 0 10 + 2x = -20 + 0 10 + 2x = -20 Add '-10' to each side of the equation. 10 + -10 + 2x = -20 + -10 Combine like terms: 10 + -10 = 0 0 + 2x = -20 + -10 2x = -20 + -10 Combine like terms: -20 + -10 = -30 2x = -30 Divide each side by '2'. x = -15 Simplifying x = -15
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