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Simplifying 2(r + -7) + -3 = 7 Reorder the terms: 2(-7 + r) + -3 = 7 (-7 * 2 + r * 2) + -3 = 7 (-14 + 2r) + -3 = 7 Reorder the terms: -14 + -3 + 2r = 7 Combine like terms: -14 + -3 = -17 -17 + 2r = 7 Solving -17 + 2r = 7 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '17' to each side of the equation. -17 + 17 + 2r = 7 + 17 Combine like terms: -17 + 17 = 0 0 + 2r = 7 + 17 2r = 7 + 17 Combine like terms: 7 + 17 = 24 2r = 24 Divide each side by '2'. r = 12 Simplifying r = 12
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