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Simplifying -7(r + 4) = -7(r + 1) Reorder the terms: -7(4 + r) = -7(r + 1) (4 * -7 + r * -7) = -7(r + 1) (-28 + -7r) = -7(r + 1) Reorder the terms: -28 + -7r = -7(1 + r) -28 + -7r = (1 * -7 + r * -7) -28 + -7r = (-7 + -7r) Add '7r' to each side of the equation. -28 + -7r + 7r = -7 + -7r + 7r Combine like terms: -7r + 7r = 0 -28 + 0 = -7 + -7r + 7r -28 = -7 + -7r + 7r Combine like terms: -7r + 7r = 0 -28 = -7 + 0 -28 = -7 Solving -28 = -7 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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