Question

PLEASE ANSWERRRRRRRRRRRRRRRRR

Answer 1

The graph suggests that the two lines meet at $(3,6)$

If this is true, that point must belong to both lines.

To check this, plug $x=3$ in both equations, and you must get $y=6$ once you simplifiy all the numbers.

In the first equation we have

$5\cdot 3-3y= -3 \iff 3y=15+3\iff 3y=18 \iff y=6$

In the second,

$3+3y=21 \iff 3y=18\iff y=6$