0
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(-70-2+9)d + (39-75+1) = -63d -35
39 + 39 + 39 + 39 + 39 + 39 = 234
15
59
273
61
5
2.7 - 20 + 39 = 21.7
The commutative property of addition.
-21.
90
75+2(32)+4(39)+47 =75+64+156+47 =75+220+47 =122+220 =342