Hillqureenid
Answered

Solve the following systems by substitution method:
x + y = 3
3x + 2y = 9

Sagot :

Mlcparra16id
x + y = 3
x = 3 - y

We plug this value for the second equation:
3x + 2y = 9
3(3-y) + 2y = 9
9 - 3y + 2y = 9
-y = 0
y = 0

x = 3 - y
x = 3 - 0
x = 3