1,1x-2,5=0,6x
1.1x-0.6x=2.5
0.5x=2.5|:0.5
x=5
6,7х=2,25х-9
6.7x-2.25x=-9
4.45x=-9|;4.45
x=-180 дробь 89
x=2 2дробь 89
16-9,5у=3у+21
-9.5y-3y=21-16
-12.5y=5|:-12.5
y=-0.4
1.25y+7.5=5y
1.25y-5y=-7.5
-3.75y=-7.5|:-3.75
y=2
0,5x-7=-2 дробь 3 х
1 дробь 2 -7=-2 дробь 3 х|*6
3x-42=-4x
3x+4x=42
7x=42|:7
x=6
