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Simplifying -7(6x + -9) + 3 = -42x + 66 Reorder the terms: -7(-9 + 6x) + 3 = -42x + 66 (-9 * -7 + 6x * -7) + 3 = -42x + 66 (63 + -42x) + 3 = -42x + 66 Reorder the terms: 63 + 3 + -42x = -42x + 66 Combine like terms: 63 + 3 = 66 66 + -42x = -42x + 66 Reorder the terms: 66 + -42x = 66 + -42x Add '-66' to each side of the equation. 66 + -66 + -42x = 66 + -66 + -42x Combine like terms: 66 + -66 = 0 0 + -42x = 66 + -66 + -42x -42x = 66 + -66 + -42x Combine like terms: 66 + -66 = 0 -42x = 0 + -42x -42x = -42x Add '42x' to each side of the equation. -42x + 42x = -42x + 42x Combine like terms: -42x + 42x = 0 0 = -42x + 42x Combine like terms: -42x + 42x = 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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