Question

Tentukan Gabungan eliminasi dan subsitusi:
1.) 4x-2y-11=0
3x-4x-7=0

Answer 1

Eliminasi x :
4x - 2y = 11 |×3|
3x - 4y = 7 |×4|

12x - 6y = 33
12x - 16y = 28
___________ _
10y = 5
y = 5/10
y = 1/2

Substitusi y = 1/2 ke persamaan 2
3x - 4y = 7
3x - 4(1/2) = 7
3x - 2 = 7
3x = 7 + 2
3x = 9
x = 9/3
x = 3

Semoga membantu :)

Answer 2

4x-2y=11 |×3|12x-6y=33
3x-4x=7 |×4|12x-16y=28 -
10y=5
y=10/5 =2
subtitusi: 4x-2y=11
4x-2 (2) =11
4x-4=11
x=11