1) 64:с = 4
c = 64 : 4
c = 16
2) x - 50 = 15*6
x - 50 = 90
x = 90 + 50
x = 140
3) a : 4 = 40 * 3
a : 4 = 120
a = 120 × 4
a = 480
4) y:10 = 700:7
y:10 = 100
y = 100 × 10
y = 1000
1) 64:с = 4
c = 64 : 4
c = 16
2) x - 50 = 15*6
x - 50 = 90
x = 90 + 50
x = 140
3) a : 4 = 40 * 3
a : 4 = 120
a = 120 × 4
a = 480
4) y:10 = 700:7
y:10 = 100
y = 100 × 10
y = 1000