Question

4x - 3y = 11
2x -5y = -1
nilai dari 3x -2y

Answer 1

7y=13
y=13/7
28x-39=77
28x=116
x=29/7
3.29/7-2.13/7=(87-26)/7
=61/7

Answer 2

4x-3y=11 | 2 | 8x-6y=22
2x-5y=-1 | 4 | 8x-20=-4
------------ (-)
-26y= -26
y=1
Cari x, ambil salah satu soal:
4x-3y=11
4x-3(1)=11
4x-3=11
4x=11+3
4x=14
x=14 : 4
x= 3,5

Ditanya : 3x-2y
=3(3,5)-2(1)
=10,5-2
=8,5