where m is the slope and b is the y-intercept
you can solve this by just looking at the y-intercept (where the line crosses the vertical axis
y = −2x + 13 has a y-int of 13
or graph and look where the 2 lines cross
y = 2x − 3 has a y-int of -3
so what do you think the answer is?
then plug in the coordinate where they meet and see if the equation is true