Поже 816 1)9-7у=2,5-3у 2) 3,2-5а=-1,8а+4 3) 0,8х-3,5=-1,2х+0,5 - вопрос №492350981619725323251843083512054863 от Makeev20 10.11.2022 14:07

Question

Математика: Поже 816 1)9-7у=2,5-3у 2) 3,2-5а=-1,8а+4 3) 0,8х-3,5=-1,2х+0,5 4) 8,6х-3,7=7,6х-5

Makeev20 · Answer

1) 9-7y=2.5-3y
9-2.5=7y-3y
4y=6.5
y= 6.5/4=1.625

2) 3.2-5a=-1.8a+4
-5a+1.8a=4-3.2
-3.2a=0.8
a= -0.8/3.2
a=-0.25

3) 0.8x-3.5=-1.2x+0.54
0.8x+1.2x=0.54+3.5
2x=4.04
x=4.04/2=2.02

4) 8.6x-3.7=7.6x-5
8.6x-7.6x=3.7-5
x=-1.3