Question 624488
Hint: Since y= -3x+13, you can replace 'y' in the second equation with '-3x+13'


to go from


2x+9<font color="red">y</font>=-8


to


2x+9<font color="red">(-3x+13)</font>=-8


So your goal is to solve 2x+9(-3x+13) = -8 for x.