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Simplifying -5x + 7 + -2x = -42 Reorder the terms: 7 + -5x + -2x = -42 Combine like terms: -5x + -2x = -7x 7 + -7x = -42 Solving 7 + -7x = -42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -7x = -42 + -7 Combine like terms: 7 + -7 = 0 0 + -7x = -42 + -7 -7x = -42 + -7 Combine like terms: -42 + -7 = -49 -7x = -49 Divide each side by '-7'. x = 7 Simplifying x = 7
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