1.2x+y=16 /*65x-6y=0 12x+6y=96 5x-6y=0------------- 17x = 96 /:17x = 96/17 x = 5 11/172*96/17 + y = 16y = 16 – 192/17y = 272/17 – 192/17 = 80/17 y= 4 12/17x = 5 11/172. 9x+8y = 1 5x-6y=11 /* (-1,8)9x+8y=1 -9x+ 10,8y= -19,8--------------------------- 18,8y = - 18,8 /:18,8y = -19x + 8*(-1) = 19x = 1 + 89x = 9 /:9x = 1y = -1
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
1.
2x+y=16 /*6
5x-6y=0
12x+6y=96
5x-6y=0
-------------
17x = 96 /:17
x = 96/17
x = 5 11/17
2*96/17 + y = 16
y = 16 – 192/17
y = 272/17 – 192/17 = 80/17
y= 4 12/17
x = 5 11/17
2.
9x+8y = 1
5x-6y=11 /* (-1,8)
9x+8y=1
-9x+ 10,8y= -19,8
---------------------------
18,8y = - 18,8 /:18,8
y = -1
9x + 8*(-1) = 1
9x = 1 + 8
9x = 9 /:9
x = 1
y = -1