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Simplifying 0.07(4x + 4) = 0.28(x + 7) + -1.68 Reorder the terms: 0.07(4 + 4x) = 0.28(x + 7) + -1.68 (4 * 0.07 + 4x * 0.07) = 0.28(x + 7) + -1.68 (0.28 + 0.28x) = 0.28(x + 7) + -1.68 Reorder the terms: 0.28 + 0.28x = 0.28(7 + x) + -1.68 0.28 + 0.28x = (7 * 0.28 + x * 0.28) + -1.68 0.28 + 0.28x = (1.96 + 0.28x) + -1.68 Reorder the terms: 0.28 + 0.28x = 1.96 + -1.68 + 0.28x Combine like terms: 1.96 + -1.68 = 0.28 0.28 + 0.28x = 0.28 + 0.28x Add '-0.28' to each side of the equation. 0.28 + -0.28 + 0.28x = 0.28 + -0.28 + 0.28x Combine like terms: 0.28 + -0.28 = 0.00 0.00 + 0.28x = 0.28 + -0.28 + 0.28x 0.28x = 0.28 + -0.28 + 0.28x Combine like terms: 0.28 + -0.28 = 0.00 0.28x = 0.00 + 0.28x 0.28x = 0.28x Add '-0.28x' to each side of the equation. 0.28x + -0.28x = 0.28x + -0.28x Combine like terms: 0.28x + -0.28x = 0.00 0.00 = 0.28x + -0.28x Combine like terms: 0.28x + -0.28x = 0.00 0.00 = 0.00 Solving 0.00 = 0.00 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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