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Simplifying -7(r + 3) = -2(r + 3) + -5r Reorder the terms: -7(3 + r) = -2(r + 3) + -5r (3 * -7 + r * -7) = -2(r + 3) + -5r (-21 + -7r) = -2(r + 3) + -5r Reorder the terms: -21 + -7r = -2(3 + r) + -5r -21 + -7r = (3 * -2 + r * -2) + -5r -21 + -7r = (-6 + -2r) + -5r Combine like terms: -2r + -5r = -7r -21 + -7r = -6 + -7r Add '7r' to each side of the equation. -21 + -7r + 7r = -6 + -7r + 7r Combine like terms: -7r + 7r = 0 -21 + 0 = -6 + -7r + 7r -21 = -6 + -7r + 7r Combine like terms: -7r + 7r = 0 -21 = -6 + 0 -21 = -6 Solving -21 = -6 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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