Which equation has a solution of x=13

x+3 = 10

x-10= 3

x/2= 26

x+12= 1

Just replace 13 for x in each of the possible equations.

1. 13+3=10
Since this is false, this is not the answer.

2. 13-10=3
Since this is true, this is the answer.

3. 13/2=26
Since this is false, this is not the answer.

4. 13+12=1
Since this is false, this is not the answer.

The answer is 2. x-10=3, since x=13 makes it 13-10=3, which is true.