Пошаговое объяснение:
1)x/11×3/7=1/20
3x/77=1/20
60x=77
x=77/60
x=1 17/60
x=1,28333
2)x/7×5/7=27/34
5x/49=27/34
170x=1323
x=1323/170
x=7 133/170
x=7/7,8235
3)x/4×3/4=6/19
3x/16=6/19
57x=96
x=32/19
x=1 13/19
x=1,68421
4)9×2/7÷x=1×6/7,x≠0
9×2/7×1/x=6/7
18/7x=6/7
126=42x
42x=126
x=3, x≠0
x=3
Пошаговое объяснение:
1)x/11×3/7=1/20
3x/77=1/20
60x=77
x=77/60
x=1 17/60
x=1,28333
2)x/7×5/7=27/34
5x/49=27/34
170x=1323
x=1323/170
x=7 133/170
x=7/7,8235
3)x/4×3/4=6/19
3x/16=6/19
57x=96
x=32/19
x=1 13/19
x=1,68421
4)9×2/7÷x=1×6/7,x≠0
9×2/7×1/x=6/7
18/7x=6/7
126=42x
42x=126
x=3, x≠0
x=3