Question

Упростить выражение: a) a*(-0,25b)*(-0,8c) b) (7a-3)-(-8-2a) c)-2(0,5x-1,4y)+3,2y d)9,6*5/6y*(-3/7)

Answer 1

A) a*(-0,25b)*(-0,8c)=0,2авс
b) (7a-3)-(-8-2a)=9а+5
c)-2(0,5x-1,4y)+3,2y=-х+2,8у+3 2у=6у-х
d)9,6*5/6y*(-3/7)=-48/5*5/6у*3/7=-24/7у=-3(3/7)у

Answer 2

a) a*(-0.25b)*(-0.8c) = 0.2abc

b) (7a-3)-(-8-2a) = 7a - 3 + 8 + 2a = 9a + 5

c) -2(0.5x-1.4y)+3.2y = -x + 5.6y

d) 9.65/6y(-3/7) = -2.4y