Question

Himpunan penyelesaian sistem persamaan 2x-3/3 - y-4/4=2 1/2 dan x+4/2 - 2y-3/4=5 1/4 adalah...

Answer 1

2x-3/3 - y-4/4  =2 1/2x+4/2 - 2y-3/4 =5 1/4
2x -  1 -   y - 1    = 5/2  x + 2 - 2y - 3/4 = 21/4
2x - y - 2 = 5/2
x - 2y + 8/4 - 3/4 = 21/4

2x - y = 5/2 + 2
x - 2y + 5/4 = 21/4

2x - y = 5/2 + 4/2
x - 2y = 21/4 - 5/4

2x - y = 9/2
x - 2y = 16/4

2x - y = 9/2   X1  =  2x-y=9/2
x - 2y = 4      X2  =  2x-4y=8
                            ---------------  -
                                 3y = -7/2
y = -7/6


x - 2y = 4
x - 2(-7/6) = 4
x + 14/6 = 4
x = 4 - 14/6
= 10/6 = 1 4/6 = 1 2/3

Maaf, kalau salah.