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