Answer:
I will answer two of them so you can get the understanding here
Substitute the number into the equation
10. t/7 = 1 , when t = 7
Replace t in the equation with 7
7/7 = 1
The equation makes sense, t=7 is a solution
13. 84 = 7y , when y = 12
Replace y in the equation with 12
84 = 7 * 12
84 = 84
The equation makes sense, y=12 is a solution
