1)5(3y-2)-4(9-y)=3(y+5) 2)14(2x-3)-5(x+4)=2(3x+5)+5x - вопрос №6907782153249352142354235515 от YankaManky 10.02.2023 14:04

Question

Математика: 1)5(3y-2)-4(9-y)=3(y+5) 2)14(2x-3)-5(x+4)=2(3x+5)+5x 15

YankaManky · Answer

1) 5(3у-2)-4(9-у)=3(у+5)
15у-10-36+4у=3у+15
15у+4у-3у=10+36+15
16у=61
у= 61/16=3,8...

2) 14(2х-3)-5(х+4)=2(3х+5)+5х
28х-42-5х-20=6х+10+5х
28х-5х-6х-5х=42+20+10
17х=72
х=72/17=4,2...