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Simplifying 126x + -72 = 18(7x + -4) Reorder the terms: -72 + 126x = 18(7x + -4) Reorder the terms: -72 + 126x = 18(-4 + 7x) -72 + 126x = (-4 * 18 + 7x * 18) -72 + 126x = (-72 + 126x) Add '72' to each side of the equation. -72 + 72 + 126x = -72 + 72 + 126x Combine like terms: -72 + 72 = 0 0 + 126x = -72 + 72 + 126x 126x = -72 + 72 + 126x Combine like terms: -72 + 72 = 0 126x = 0 + 126x 126x = 126x Add '-126x' to each side of the equation. 126x + -126x = 126x + -126x Combine like terms: 126x + -126x = 0 0 = 126x + -126x Combine like terms: 126x + -126x = 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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