2x+y=15 dan3x+2y=-18
Matematika
aryasemidwi7
Pertanyaan
2x+y=15 dan3x+2y=-18
2 Jawaban
-
1. Jawaban amandarose123
2x + y = 15 (x2)
3x + 2y = - 18 (x1)
Sehingga
4x +2y =30
3x +2y = - 18
------------------- -
x = 48
2 (48) + y = 15
96 + y = 15
y = - 81 -
2. Jawaban rahmachikakusuma
2x+y=15 ║ X 2
3x+2y=-18║ X 1
⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔
4x+2y=30
3x+2y=-18
⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔ -
x=48
3x+2y=-18
3.48+2y=-18
144+2y=-18
2y=-18-144
2y=-162
y= -81