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2) 2(3m + 2n) + 3(m - 2n) = 6m + 4n + 3m - 6n
= 9m - 2n
3) 4q - 5 = - 9
4q = - 4
q = - 1
4) 8y - 6y = - 20
2y = - 20
y = - 10