Terlampir ^^
Nt : Boleh req soal ._.
4x + y = 9 pers(1)
x + 4y = 6 pers(2)
Eliminasi pers(1) dan (2)
4x + y = 9 |×1| 4x + y = 9
x + 4y = 6 |×4| 4x + 16y = 24
——————— -
-15y = -15
y = -15/-15
y = 1
Substitusi nilai y = 1 ke pers(1)
4x + y = 9
4x + (1) = 9
4x + 1 = 9
4x = 9 - 1
4x = 8
x = 8/4
x = 2
Cari nilai 2x + 3y (substitusi nilai x dan y)
» 2x + 3y
» 2(2) + 3(1)
» (2 × 2) + (3 × 1)
» 4 + 3
» 7
Penjelasan dengan langkah-langkah:
4x + y = 9 .1
x + 4y = 6 .4
4x + 1 y = 9
4x + 16y = 24 -
-15y = - 15
y = -15 ÷ -15
y = 1
4x + 1 = 9
4x = 9 - 1
x = 8 ÷ 4
x = 2
2x + 3y = 2.2 + 3.1
= 4 + 3
= 7
Maaf kalau salah.
Semoga membantu.
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