Answer: Question 1 (x=-3 and y=2)
Explanation:
Question 1
Subtract 5x from both sides of the equation
y=-13-5x
6x+6y=-6
then replace all occurrences of y with -13 - 5x in each equation
-24x -78=-6
solve or x in -24x - 78=-6
y=-3
y=-13 - 5x
replace all occurences of x with -3 in each equation
y=2
x=-3