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асаляя
@асаляя
July 2022
1
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Найдите значение выражения
1) 3(а+2в)-а при а+3в=1,1
2) 2,4(3х+5у)-4у при 0,9х+у=2
3) 8(0,5а+3в)+8а при а+2в=2,5
4) 3(0,6м+5н)-3н при 0,3м+2н=4
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ArmLord
1) 3(а+2в)-а =3a+6в-а=2а+6в=2(а+3в)=2*1,1=2,2
2) 2,4(3х+5у)-4у=7,2x+12y-4y=7,2x+8y=8(0.9x+y)=8*2=16
3) 8(0,5а+3в)+8а=4a+24в+8а=12а+24в=12(а+2в)=12*2․5=30
4) 3(0,6м+5н)-3н=1,8м+15н-3н=1,8м+15н-3н=1,8v+12н=6(0,3м+2н)=6*4=24
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Answers & Comments
2) 2,4(3х+5у)-4у=7,2x+12y-4y=7,2x+8y=8(0.9x+y)=8*2=16
3) 8(0,5а+3в)+8а=4a+24в+8а=12а+24в=12(а+2в)=12*2․5=30
4) 3(0,6м+5н)-3н=1,8м+15н-3н=1,8м+15н-3н=1,8v+12н=6(0,3м+2н)=6*4=24