2.2х\3.5=22\5 помогите 9\5=6.3х\7 21\0.7х=9.5\1.9 3.4\9=17х\4.9

Question

2.2х\3.5=22\5 помогите

9\5=6.3х\7

21\0.7х=9.5\1.9

3.4\9=17х\4.9

Answer 1

2.2x : 3.5 = 22 : 5
2.2x : 3.5 = 4.4
2.2x = 4.4 * 3.5
2.2x = 15.4
x = 15.4 : 2.2
x = 7

Comments

1.8 = 6.3x : 7
1.8 * 7 = 6.3x
12,6 = 6.3x
x = 12.6 : 6.3
x = 2

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21:0.7х=9.5:1.9
21:0.7x=5
0.7x=21:5
0.7x=4,2
x=4.2:0.7
x=6