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Simplifying 16x + -7(x + 1) = 2 + -9(1 + -1x) Reorder the terms: 16x + -7(1 + x) = 2 + -9(1 + -1x) 16x + (1 * -7 + x * -7) = 2 + -9(1 + -1x) 16x + (-7 + -7x) = 2 + -9(1 + -1x) Reorder the terms: -7 + 16x + -7x = 2 + -9(1 + -1x) Combine like terms: 16x + -7x = 9x -7 + 9x = 2 + -9(1 + -1x) -7 + 9x = 2 + (1 * -9 + -1x * -9) -7 + 9x = 2 + (-9 + 9x) Combine like terms: 2 + -9 = -7 -7 + 9x = -7 + 9x Add '7' to each side of the equation. -7 + 7 + 9x = -7 + 7 + 9x Combine like terms: -7 + 7 = 0 0 + 9x = -7 + 7 + 9x 9x = -7 + 7 + 9x Combine like terms: -7 + 7 = 0 9x = 0 + 9x 9x = 9x Add '-9x' to each side of the equation. 9x + -9x = 9x + -9x Combine like terms: 9x + -9x = 0 0 = 9x + -9x Combine like terms: 9x + -9x = 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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