Respuesta :

Given x = 5

We will find which equation will give a solution x = 5

1) x/2 = 10

so, x = 2 * 10 = 20

So, option (1) is wrong

2) x - 7 = 12

x = 12 + 7 = 19

So, option 2 is wrong

3) 2 + x = 3

x = 3 - 2 = 1

So, option 3 is wrong

4) 3x = 15

x = 15/3 = 5

So, the answer is option 3x = 15

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