Question

Two lines, C and D, are represented by the equations given below:

Answer 1

Bought lines need to pass same point, so:

x+12 = y    =    y = 3x+2
x+12=3x+2     |-2
x+10=3x         |-x
10=2x             |/2
5=x
x+12 = y   => 5+12 = y =>y = 17

(x,y) => (5,17)