Solve the linear equation using any technique: 3x + 12 = –7x – 18 Name the technique. Check.
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Group like terms. 3x + 7x = -18 - 12 Simplify. 10x = -30 x = -3 Check by substituting x = -3 back into the original equation. 3(-3) + 12 = -7(-3) - 18 -9 + 12 = 21 - 18 3 = 3 ... correct.
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