Question

1) 2x-3y = 5 dan 3x-2y = -4
2) x-y = 16 dan 4x + 2y = 28

tolong pake cara eliminasi dan substitusi makasih dikumpulin bsk tolong ya yg bisa:)

Answer 1

Nyari nilai x dan y kan? kalau iya bgini

1) 2x-3y = 5 ( dikali 2)
3x-2y = -4 (dikali 3)
___________
4x-6y = 10
9x-6y = -12
___________+
13x = -2
x = -2/13

sub nilai x ke smbrang pers. misal persamaan 1
2 kali (-2/13) - 3y = 5
-4/13 - 3y = 5
-3y = 5 kali 13/4
-3y = 65/4
y = - 65/4 kali 1/3
y = -65/12


2) x-y = 16 (kali 4)
4x + 2y = 28 (kali 1)
___________

4x -4y = 64
4x + 2y = 28
___________ -
-6y = 36
y = -6

subtitusi ke persamaan 1

x - (-6) = 16

x+ 6 = 16
x = 16 -6
x = 10


srry klau slah