Tentukan himpunan penyelesaian dari system persamaan linear berikut ini 6x+2y=-1 2x-4y=-7

bismillah

eliminasi
6x + 2y = -1. Ix1I. 6x + 2y = -1
2x - 4y = -7. Ix3I. 6x -12y = -21
------------------------------------------ -
2y - (-12y) = -1 - (-21)
14 y = 20
y = 20/14 = 10/7 = 1 3/7

6x + 2.10/7 = -1
6x + 20/7 = -1
6x = -1 - 20/7 = -27/7
x = 27/7 : 6
x = 27/7 * 1/6
x = 27/42 = 9/14


semoga bermanfaat