Question

Solve the system of equations. Enter your answer as an ordered pair.

7x + 3y = 30

-2x + 3y = 3

Answer 1

...

Answer 2

-2x+3y = 3
-2x = 3-3y
x = (3-3y)/-2
x = (-3+3y)/2

7(-3+3y/2)+3y = 30
(-21+21y)/2+3y = 30
(-21+21y+6y)/2 = 30
-21+27y = 30*2
27y = 60+21
y = 81/27
y = 3

-2x+3*3 = 3
-2x+9 = 3
-2x = 3-9
x = -6/-2
x = 3

x=3,y=3