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Simplifying 9(-9) + 2 = 8(-9) + -7 Multiply 9 * -9 -81 + 2 = 8(-9) + -7 Combine like terms: -81 + 2 = -79 -79 = 8(-9) + -7 Multiply 8 * -9 -79 = -72 + -7 Combine like terms: -72 + -7 = -79 -79 = -79 Add '79' to each side of the equation. -79 + 79 = -79 + 79 Combine like terms: -79 + 79 = 0 0 = -79 + 79 Combine like terms: -79 + 79 = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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