А) <span>4y - 5,8 = 18,4
4y = 18,4 + 5,8
4y = 24,2
y = 24,2 / 4
y = 6,05
</span><span>б) 32 + ( z - 5,38 ) = 26
</span>z - 5,38 = 26 - 32
z - 5,38 = -6
z=-6 + 5,38
z = - 0,62
(12-4)+(19/32-2/32)=8 17/32
5/7 + 4/5 - 23/35 = 25/35 + 28/35 - 23/35 = 30/35 = 6/7