Dik sistem persamaan dari 5x-y = -11 dan X-3y =-17 nilai dari 2x+y adalah...........?

5x-y = -11 /×3/ 15x-3y = -33
x-3y = -17/×1/ x-3y = -17
__________-
14x = -16
x = -16/14 = -8/7
x-3y = -17
-8/7+3y= -17
3y = -17 + 8/7
y. = -111/7/3
y = - 111/21

2x+y = 2(-8/7) + -111/21
= -16/7 - 111/21
= -48-111/21
= -159/21




maaf kalo salah