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Simplifying 15x + -153 = 8x + -90 Reorder the terms: -153 + 15x = 8x + -90 Reorder the terms: -153 + 15x = -90 + 8x Solving -153 + 15x = -90 + 8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8x' to each side of the equation. -153 + 15x + -8x = -90 + 8x + -8x Combine like terms: 15x + -8x = 7x -153 + 7x = -90 + 8x + -8x Combine like terms: 8x + -8x = 0 -153 + 7x = -90 + 0 -153 + 7x = -90 Add '153' to each side of the equation. -153 + 153 + 7x = -90 + 153 Combine like terms: -153 + 153 = 0 0 + 7x = -90 + 153 7x = -90 + 153 Combine like terms: -90 + 153 = 63 7x = 63 Divide each side by '7'. x = 9 Simplifying x = 9
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