" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x - y = 5
x=3-3y
3-3y-y=5
x=3-3y
3-4y=5
x=3-3y
-4y=5-3
x=3-3y
-4y=2/:-4
x=3-3y
y=-1/2
x=3-3*(-1/2)
y=-1/2
x=3+1i1/2
y=-1/2
x=4i1/2
y=-1/2
b) 2x - y = 10
x + 5y = -17
2x-y=10
x=-17-5y
2*(-17-5y)-y=10
x=-17-5y
-34-10y-y=10
x=-17-5y
-11y=10+34
x=-17-5y
-11y=44/:(-11)
x=-17-5y
y=-4
x=-17-5*(-4)
y=-4
x=3
c) 3m + n = 9
2m - 5n = -11
n=9-3m
2m-5*(9-3m)=-11
n=9-3m
2m-45+15m=-11
n=9-3m
17m=-11+45
n=9-3m
17m=34/17
n=9-3m
m=2
n=9-3*2
m=2
n=3
m=2
d) ½x - 2y = 8
2x + 5y = 6
1/2x=8+2y/*2
2x+5y=6
x=16+4y
2*(16+4y)+5y=6
x=16+4y
32+8y+5y=6
x=16+4y
13y=6-32
x=16+4y
13y=-26/:13
x=16+4y
y=-2
x=16+4*(-2)
y=-2
x=16-8
y=-2
x=8
y=-2
e) ½x - ¾y = 0
⅔x + 1¼y = 9
1/2x=3/4y/*2
2/3x+1i1/4y=9
x=3/2y
2/3*3/2y+1i1/4y=9
x=3/2y
y+1i1/4y=9
x=3/2y
2i1/4y=9/:2i1/4
x=3/2y
y=4
x=3/2*4
y=4
x=6
y=4
f) 3x + 4y = 1⅔
6x + 3y = 1¼
4y=1i2/3-3x/:4
6x + 3y = 1¼
y=5/12-3/4x
6x+3(5/12-3/4x)=1i1/4
y=5/12-3/4x
6x+5/4-9/4x=1i1/4
y=5/12-3/4x
3i3/4x=1i1/4-5/4
y=5/12-3/4x
3i3/4x=0/:3i3/4
y=5/12-3/4x
x=0
y=5/12-3/4*0
x=0
y=5/12
x=0