Question

4x+6y=12*62
x+y=12


18=x+y
9=y−2x

Using the two equations above, write and solve the systems to find x and y.

Answer 1

y - 2x = 9
y + x = 18
subtract
-3x = 27
x = -9
sup this into first equn.:
-9 + y = 18
y = 27

(x,y) = (-9,27)