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Simplifying 0.11(9000) + -0.04(21000 + -9000) = 510 Multiply 0.11 * 9000 990 + -0.04(21000 + -9000) = 510 Combine like terms: 21000 + -9000 = 12000 990 + -0.04(12000) = 510 Multiply -0.04 * 12000 990 + -480 = 510 Combine like terms: 990 + -480 = 510 510 = 510 Add '-510' to each side of the equation. 510 + -510 = 510 + -510 Combine like terms: 510 + -510 = 0 0 = 510 + -510 Combine like terms: 510 + -510 = 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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