Tentukan penyelesaian dari persamaan 2p+3q=12 dan 4p-7q =-2
Jawaban Terkonfirmasi
2p + 3q = 12 [kalikan 2]
4p – 7q = -2 [kalikan 1]
4p + 6q = 24
4p – 7q = -2
—————– –
-13q = 26
q = 26/-13
q = -2
subtitusi
2p + 3(-2) = 12
2p – 6 = 12
2p = 18
p = 18/2
p = 9
2p + 3q = 12 | x 2 | ⇒ 4p + 6q = 24
4p – 7q = -2 | x 1 | ⇒ 4p - 7q = -2 -
13q = 26
q = 2
2p + 3q = 12
2p + 3(2) = 12
2p + 6 = 12
2p = 6
p = 3
p + q =3 + 2 = 5