Answer:
mr
Step-by-step explanation:
rm x 3/11 ÷ 3/11
79
the top left
x=-4 and y=4
(6x+9y)-(6x+7y)=12-4=8
--> 9y-7y=8
-->2y=8-->y=4
-->6x+7×4=4 -->x=-4