Solve the following simultaneous equation (show working). Q1) xy = 12
(x-1)(y+2)=15
Will mark brainliest to the right answer

Can someone check if i did this correct. it’s number 4 if you’re wondering.

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?