Jawapan

2016-03-17T22:49:00+08:00
X -3y = -6
x = 3y - 6

substitute x :
4x + 5y = -2
4 ( 3y-6) + 5y = -2
12y - 24 + 5y =-2
17y = 22
y = 22/17

when y = 22/17
x = 3y - 6
x = 3(22/17) - 6
x = 66/17 - 6
x = ___ gunalah calc
salah bg soalan..yg first tu x-3/2y= -6 4x+5y= -2
x-3/2y = -6 , x = 3/2y - 6 substitute x into 4x + 5y = -2 , 4(3/2y-6) + 5y = -2 , 6y - 24 + 5y = -2 , 11y - 24 = -2 , 11y = 22 , y = 2 # substitute y = 2 , x = 3/2y - 6 , x = 3/2(2) - 6 , x = -3 #