ПОМОГИТЕ!!!ПЛИЗ.НОМЕР 146 (1,2,3)

Question

ПОМОГИТЕ!!!ПЛИЗ.НОМЕР 146 (1,2,3)

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Answer 1

1)1.4/2 1/3=0.2x/3
1 2/5 / 2 1/3=0.2x/3
7/2*3/7=0.2x/3
3/2=0.2x/3
0.2x=3*3/2
x=22.5
2)2 1/7 /2.5=8.4/7x
15/7*2/5=8.4/7x
6/7=8.4/7x
7x=8.4*7/6
7x=9.8
x=1.4
3)4.5x/2.7=9/1.8
4.5x/2.7=5
4.5x=5*2.7
x=5*2.7/4.5
x=3