(20 баллов) Решите пожалуйста

Question

(20 баллов) Решите пожалуйста

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Answer 1

1)

10*x = 12*7

10x = 84

x = 84 : 10

x = 8,4

2)

3*x = 12 * 7

3x = 84

x = 84 : 3

x = 28

3)

5*x = 25 * 7

5x = 175

x = 175 : 5

x = 35

4)

5*x = 3*2

5x = 6

x = 6 : 5

x = 1,2

5)

8*x = 21*5

8x = 105

x = 105 : 8

x = 13,125

6)

1,5*x = 5*1,8

1,5x = 9

x = 9 : 1,5

x = 6

7)

40*x = 100*2

40x = 200

x = 200 : 40

x = 5

8)

x*x = 6,5 * 4

x² = 26

x = √26