3x-2y=11 dan 2x-5y=0,jika x=a y=b maka 2a-3b adl

Bab Sistem Persamaan Linear Dua Variabel

3x - 2y = 11 | × 2 |
2x - 5y = 0 | × 3 |

6x - 4y = 22
6x - 15y = 0
__________ -
11y = 22
y = 2

3x - 2y = 11
3x - 2(2) = 11
3x = 11 + 4
x = 15/3
x = 5

2a - 3b
= 2(5) - 3(2)
= 10 - 6
= 4

3x-2y=11
2x-5y=0

15x-10y=55
4x-10y=0
11x=55
x=55/11
x=5

sub(1)
3x-2y=11
3(5)-2y=11
15-2y=11
15-11=2y
4=2y
4-2=y
2=y

x=a=5
y=b=2
jadi,
2a-3b
=2.5-3.2
=10-6
=4

semoga benar jawabannya:)