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Simplifying -3 + -42r = -6(1 + 7r) + -7 -3 + -42r = (1 * -6 + 7r * -6) + -7 -3 + -42r = (-6 + -42r) + -7 Reorder the terms: -3 + -42r = -6 + -7 + -42r Combine like terms: -6 + -7 = -13 -3 + -42r = -13 + -42r Add '42r' to each side of the equation. -3 + -42r + 42r = -13 + -42r + 42r Combine like terms: -42r + 42r = 0 -3 + 0 = -13 + -42r + 42r -3 = -13 + -42r + 42r Combine like terms: -42r + 42r = 0 -3 = -13 + 0 -3 = -13 Solving -3 = -13 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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