metoda podstawiania. 3 przykłady na jutro!!
1. 3(x-1)+2(2-y)= -5-y
x+y=2
2. 1/2x+1/4y =1/2
x+1/4y=-1
3. 2x-4/3 y=-3
x+1/2y=2
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
1. x=2-y czyli 3(2-y-1)+4-2y=-5-y
3(1-y) -2y+y=-5-4
3-3y -2y+y=-5-4
-3y-2y+y=-5-4-3
-4y=-12
y=3 a x=2-y czyli x=2-3=-1 odp y=3 x=-1
2. 1/2x+1/4y=1/2
x+1/4y=-1 to x=-1-1/4y
podstawiamy do pierwszego1/2(-1-1/4Y)+1/4y=1/2
-1/2-1/8Y+1/4y=1/2
- 1/8y-2/8y=1/ 2-1/2
-3/8y=0
y=0 czyli x=-1-1/4 razy0
x=-1-0=-1 odp x=-1 y=0
3. 2x-4/3y=-3
x+1/2y=2 to x=2-1/2y
czyli 2(2-1/2y)-4/3y=-3
4-y-4/3y=-3
-7/3y=-7
y=3 to x=2-1/2 razy3
x= 2-3/2
x=1/2 odp x=1/2 y=3