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Simplifying 7 + 7(x + -3) = 7(x + -2) Reorder the terms: 7 + 7(-3 + x) = 7(x + -2) 7 + (-3 * 7 + x * 7) = 7(x + -2) 7 + (-21 + 7x) = 7(x + -2) Combine like terms: 7 + -21 = -14 -14 + 7x = 7(x + -2) Reorder the terms: -14 + 7x = 7(-2 + x) -14 + 7x = (-2 * 7 + x * 7) -14 + 7x = (-14 + 7x) Add '14' to each side of the equation. -14 + 14 + 7x = -14 + 14 + 7x Combine like terms: -14 + 14 = 0 0 + 7x = -14 + 14 + 7x 7x = -14 + 14 + 7x Combine like terms: -14 + 14 = 0 7x = 0 + 7x 7x = 7x Add '-7x' to each side of the equation. 7x + -7x = 7x + -7x Combine like terms: 7x + -7x = 0 0 = 7x + -7x Combine like terms: 7x + -7x = 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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