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Simplifying 71 + -7x = 2x + 21 Reorder the terms: 71 + -7x = 21 + 2x Solving 71 + -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. 71 + -7x + -2x = 21 + 2x + -2x Combine like terms: -7x + -2x = -9x 71 + -9x = 21 + 2x + -2x Combine like terms: 2x + -2x = 0 71 + -9x = 21 + 0 71 + -9x = 21 Add '-71' to each side of the equation. 71 + -71 + -9x = 21 + -71 Combine like terms: 71 + -71 = 0 0 + -9x = 21 + -71 -9x = 21 + -71 Combine like terms: 21 + -71 = -50 -9x = -50 Divide each side by '-9'. x = 5.555555556 Simplifying x = 5.555555556
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