In a school's presidential race, Jeb received 100 votes

C)

Step-by-step explanation:

We are given with a pair of linear equations,

y=x+12

y=3x+2

Let us solve them for x and y

In order to solve them we subtract first equation from the second ,

0=2x-10

Adding 2x on both sides we get

2x=10

Dividing both sides by 2 we get

x=5

Now replacing this value of x  in first equation

y=5+12=17

Hence the solution of the two equations is (5,12)

And by solution of a linear pair of equations, we mean that both the lines passes through that point.