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Simplifying 15 = 7 + -4x Solving 15 = 7 + -4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4x' to each side of the equation. 15 + 4x = 7 + -4x + 4x Combine like terms: -4x + 4x = 0 15 + 4x = 7 + 0 15 + 4x = 7 Add '-15' to each side of the equation. 15 + -15 + 4x = 7 + -15 Combine like terms: 15 + -15 = 0 0 + 4x = 7 + -15 4x = 7 + -15 Combine like terms: 7 + -15 = -8 4x = -8 Divide each side by '4'. x = -2 Simplifying x = -2
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