Sagot :
[tex]5x - y = 8 \\
-5x + 4y = -17[/tex]
add both equations x to x, y to y and constant to constant.
[tex]5x - 5x + (-y + 4y) = 8-17 \\ 3y = -9 \\ y = -3\\ x=1[/tex]
add both equations x to x, y to y and constant to constant.
[tex]5x - 5x + (-y + 4y) = 8-17 \\ 3y = -9 \\ y = -3\\ x=1[/tex]
Since if you add both equations, and since if 5x and -5x is added they will become 0, that means wala na ang y. Kay i-add lang ang dalawang equation.
5x - y = 8
+ -5x + 4y = -17
0 + 3y = -9
3y = -9
3y / 3 = -9/3
y = -3
Kaya, ngayon, puwede na ang y maging -3, kaya subukan nating palitan ang y at ipalit natin ang -3 para x na lang ang maiwan.
-5x + 4y = -17
-5x + 4 (-3) = -17
-5x - 12 = -17
-5x = -17 + 12
-5x = -5
-5x / -5 = -5 / -5
x = 1
Kaya, ang x = 1, at y = -3
5x - y = 8
+ -5x + 4y = -17
0 + 3y = -9
3y = -9
3y / 3 = -9/3
y = -3
Kaya, ngayon, puwede na ang y maging -3, kaya subukan nating palitan ang y at ipalit natin ang -3 para x na lang ang maiwan.
-5x + 4y = -17
-5x + 4 (-3) = -17
-5x - 12 = -17
-5x = -17 + 12
-5x = -5
-5x / -5 = -5 / -5
x = 1
Kaya, ang x = 1, at y = -3