Answer:
4540
Step-by-step explanation:
(7,3)
Step-by-step explanation:
X= -2+3y
....
-2+3y-3y=-2
-2+3y+3y=16
.......
6y=18
...
y=3
x=7
Use a variable for the unknown number so it would be 77-2x also if you don't know a number and a variable together means to multiply them