Find the value of y in the equation 7y = 35.

The solution of an equation is the value of the variable in an equation that satisfies the equation.

 Given, 7y = 35

To check which of the following value is solution to the given equation, we can use the trial and error method.

Put y = 35, 7$\times$35 = 245 $\ne$35, so 35 is not the solution.

Put y = 5, 7$\times$5 = 35 = 35, so 5 is the solution.

Put y = 7, 7$\times$7 = 49 $\ne$35, so 7 is not the solution.

Put y = 1, 7$\times$1 = 7 $\ne$35, so 1 is not the solution.

Hence, y = 5 is the solution.