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-3m=-12
m=4
Semoga Membantu
⇒ 2 - 2m + 3 = m - 7
⇒ 5 - 2m = m + 7
⇒ m + 2m = 5 - 7
⇒ 3m = -2
⇒ m = -2/3
Terimakasih semoga membantu