Which equation shows the commutative property of addition?

a. -5 + (3+4) = (-5+3) +4
b. -3 + (7+3) = -3 +(3+7)
c. -3*5 + 8 = 5*(-3) + 8
d. -2(3+5) = -2*3 + (-2)*5

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step-by-step explanation: