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3x-2y=12 [X1] 3x-2y=12
5x+y =7. [X2] 10x+2y=14
----------------- +
13x = 26
x = 26/13
x = 2
x nya di masukkan ke dalam salah satu persamaan.
3x-2y=12
3(2)-2y=12
6-2y. = 12
2y=12-6
2y=6
y=6/2
Y= 3
=4x+3y
=4(2)+3(3)
=8+9
=17
------------------------------------------------------------ jadi jawabannya 17