a) 5 × (-4) + 7 × 3 = -20 + 21 = 1
b) 50 - 3 × 9 = 50 - 27 = 23
c) -2 × (-8) - 6 × (-2) = 16 + 12 = 28
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a) 5 × (-4) + 7 × 3 = -20 + 21 = 1
b) 50 - 3 × 9 = 50 - 27 = 23
c) -2 × (-8) - 6 × (-2) = 16 + 12 = 28