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Simplifying 7 + 10x = -20 + x Solving 7 + 10x = -20 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 7 + 10x + -1x = -20 + x + -1x Combine like terms: 10x + -1x = 9x 7 + 9x = -20 + x + -1x Combine like terms: x + -1x = 0 7 + 9x = -20 + 0 7 + 9x = -20 Add '-7' to each side of the equation. 7 + -7 + 9x = -20 + -7 Combine like terms: 7 + -7 = 0 0 + 9x = -20 + -7 9x = -20 + -7 Combine like terms: -20 + -7 = -27 9x = -27 Divide each side by '9'. x = -3 Simplifying x = -3
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