Question

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

Answer 1

a) 2b+(7a-9b) = 2b+7a-9b = 7a-7b = 7*(a-b)
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