Question

Найдите корень уравнения.
в)8+2/3y=14
г)27=6y+39
и)1.2t+0.4=1

Answer 1

1.2t+0.4=1
1.2t=1-0.4
1.2t=0.6
t=0.6:1.2
t=0.5
########
27=6y+39
27-39=6y
6y=-12
y=-12:6
y=-2
##########
8 + 2/3 y=14
2/3 y =14-8
2/3 y=6
2y=6×3
2y=18
y=18:2
y=9