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Simplifying 8x + 56 = 15x + 21 Reorder the terms: 56 + 8x = 15x + 21 Reorder the terms: 56 + 8x = 21 + 15x Solving 56 + 8x = 21 + 15x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15x' to each side of the equation. 56 + 8x + -15x = 21 + 15x + -15x Combine like terms: 8x + -15x = -7x 56 + -7x = 21 + 15x + -15x Combine like terms: 15x + -15x = 0 56 + -7x = 21 + 0 56 + -7x = 21 Add '-56' to each side of the equation. 56 + -56 + -7x = 21 + -56 Combine like terms: 56 + -56 = 0 0 + -7x = 21 + -56 -7x = 21 + -56 Combine like terms: 21 + -56 = -35 -7x = -35 Divide each side by '-7'. x = 5 Simplifying x = 5
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