Question

как решить уравнение x:30+1:5=3:5

Answer 1

1 способ
x/30 + 1/5 = 3/5    /*30
x + 6 = 3*6
x + 6 = 18
x = 18 - 6
x = 12

2 способ
x/30 + 1/5 = 3/5
x/30 = 3/5 - 1/5
x/30 = 2/5
x = (2*30)/5
x = 60/5
x = 12

Answer 2

спасибо

Answer 3

х:30+1:5=3:5
х/30+0.2=0.6
х/30+2/10=6/10
30×х/30+30 x 2/10=30 x 6/10
х+3 × 2=3 × 6
х+6=18
х=18-6
х=12