Question

Упростите выражение:

a) 5(x+1.4y)-0.8(2x+y)

б) 2/3(x-y-z)-(2/3x-y-z)

в) -a+0.5(3a+0.2b)-(a+0.1b)

г) -10(2/5b+1/2)+3/4(8-b)+5b

/-дробная черта

Answer 1

a) 5(x+1.4y)-0.8(2x+y)=5х+7у-1,6х-0,8у=3,4х+6,2

б) 2/3(x-y-z)-(2/3x-y-z)=2/3х-2/3у-2/3z-2/3x+y+z=1/3y+1/3z=1/3(y+z)

в) -a+0.5(3a+0.2b)-(a+0.1b)=-a+1.5a+0.1b-a-0.1b=-0.5a

г) -10(2/5b+1/2)+3/4(8-b)+5b=4b-5+6-3/4b=3.25b+1

Answer 2

a) 5(x+1.4y)-0.8(2x+y)=5х+7у-1,6х-0,8у=3,4х+6,2

б) 2/3(x-y-z)-(2/3x-y-z)=2/3х-2/3у-2/3z-2/3x+y+z=1/3y+1/3z=1/3(y+z)

в) -a+0.5(3a+0.2b)-(a+0.1b)=-a+1.5a+0.1b-a-0.1b=-0.5a

г) -10(2/5b+1/2)+3/4(8-b)+5b=4b-5+6-3/4b=3.25b+1