4. 3p+2q=10dan2p-q=2 5. 6y=v+1dan4y=3v-2 Berapah hasil penyelsaiannya

4.
3p + 2q = 10 (x1)
2p - q = 2 . (x2)

3p + 2q = 10
4p - 2q = 4
------------------ (+)
7p = 14
q = 14/7
q = 2

2p - q = 2
2p - 2 = 2
2p = 2 + 2
2p = 4
p = 4/2
p = 2

5.
6y - v = 1 . (x3)
4y - 3v = -2 (1)

18y - 3v = 3
4y - 3v = -2
------------------- (-)
14y = 5
y = 5/14

6y - v = 1
6(5/14) - v = 1
v = 30/14 - 1
v = 30/14 - 14/14
v = 16/14
v = 8/7