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Simplifying 5x + -7 = 128 + -10x Reorder the terms: -7 + 5x = 128 + -10x Solving -7 + 5x = 128 + -10x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10x' to each side of the equation. -7 + 5x + 10x = 128 + -10x + 10x Combine like terms: 5x + 10x = 15x -7 + 15x = 128 + -10x + 10x Combine like terms: -10x + 10x = 0 -7 + 15x = 128 + 0 -7 + 15x = 128 Add '7' to each side of the equation. -7 + 7 + 15x = 128 + 7 Combine like terms: -7 + 7 = 0 0 + 15x = 128 + 7 15x = 128 + 7 Combine like terms: 128 + 7 = 135 15x = 135 Divide each side by '15'. x = 9 Simplifying x = 9
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