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Simplifying 56 + -7x = 2x + 21 Reorder the terms: 56 + -7x = 21 + 2x Solving 56 + -7x = 21 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 56 + -7x + -2x = 21 + 2x + -2x Combine like terms: -7x + -2x = -9x 56 + -9x = 21 + 2x + -2x Combine like terms: 2x + -2x = 0 56 + -9x = 21 + 0 56 + -9x = 21 Add '-56' to each side of the equation. 56 + -56 + -9x = 21 + -56 Combine like terms: 56 + -56 = 0 0 + -9x = 21 + -56 -9x = 21 + -56 Combine like terms: 21 + -56 = -35 -9x = -35 Divide each side by '-9'. x = 3.888888889 Simplifying x = 3.888888889
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