УПРОСТИТЬ ВЫРАЖЕНИЕ:
a) 2b+(7a-9b)
b) -4x-(8p-4x)
c) (5+a)+(7a-5)
d) -(4-8b)+(-8b-15)
a) 2b+(7a-9b)
b) -4x-(8p-4x)
c) (5+a)+(7a-5)
d) -(4-8b)+(-8b-15)
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Answers & Comments
b) -4x-(8p-4x)=-4x-8p+4x=-8p
c) (5+a)+(7a-5)=5+a+7a-5=8a
d) -(4-8b)+(-8b-15)=-4+8b-8b-15=-19
b) -4x-(8p-4x) = -4x-8p+4x = -8p
c) (5+a)+(7a-5) = 5+a+7a-5 = 8a
d) -(4-8b)+(-8b-15) = -4+8b-8b-15 = -19