3 y¼ 9
31 y
31
¼
9
3
y¼ 3
The solution isx¼2 andy¼3. You can check the answer.
Try These
Solve each system.
1 : 5 xþy¼ 7
2 x 3 y¼ 4
2 : 4 xþ 5 y¼ 2
xþ 3 y¼ 9
3 : 4 x 3 y¼ 1
2 xþy¼ 13
4 : x¼ 2 y
3 xþ 4 y¼ 40
5 : 2 xy¼ 11
y¼xþ 2
SOLUTIONS:
- Solve the first equation fory.
5 xþy¼ 7
5 x 5 xþy¼ 7 5 x
y¼ 7 5 x
202 REFRESHER V Systems of Equations