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Simplifying 31 + -9x = 15 + 7x Solving 31 + -9x = 15 + 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. 31 + -9x + -7x = 15 + 7x + -7x Combine like terms: -9x + -7x = -16x 31 + -16x = 15 + 7x + -7x Combine like terms: 7x + -7x = 0 31 + -16x = 15 + 0 31 + -16x = 15 Add '-31' to each side of the equation. 31 + -31 + -16x = 15 + -31 Combine like terms: 31 + -31 = 0 0 + -16x = 15 + -31 -16x = 15 + -31 Combine like terms: 15 + -31 = -16 -16x = -16 Divide each side by '-16'. x = 1 Simplifying x = 1
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