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
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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
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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
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