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1.x=y
5x-y=4
x=y
5y-y=4
4y=4\:4
y=1
1=1
2.y=2x+1
4x+y=13
4x+2x+1=13
y=2x+1
6x+1=13
6x=13-1
6x=12\6
x=2
y=2*2+1
y=5
3.5y-x=3
x=3-y
5y-3-y=3
4y=6\:4
y=6\4=3\2
x=3-3\2=3\2
4.a=b
2a+b=9
a=b
2b+b=9
3b=9\:3
b=3
3=3
5.u=4v
5u-v=10
u=4v
5*4v-v=10
20v-v=10
19v=10\:19
v=10\19
u=4*10\19=40\19
6.6x-3y=9
x+5y=-9,5
6x-3y=9
x=-9,5-5y
6(-9,5-5y)-3y=9
-57-30y-3y=9
-33y=9+57
-33y=66\:(-33)
y=-2
x=-9,5-5*(-2)
x=-9,5-10
x=-19,5
mam nadzieje ze pomoglem
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1.x=y
5x-y=4
x=y
5y-y=4
x=y
4y=4\:4
x=y
y=1
1=1
2.y=2x+1
4x+y=13
4x+2x+1=13
y=2x+1
6x+1=13
y=2x+1
6x=13-1
y=2x+1
6x=12\6
y=2x+1
x=2
y=2*2+1
x=2
y=5
3.5y-x=3
x=3-y
5y-3-y=3
x=3-y
4y=6\:4
x=3-y
y=6\4=3\2
x=3-3\2=3\2
4.a=b
2a+b=9
a=b
2b+b=9
a=b
3b=9\:3
a=b
b=3
3=3
5.u=4v
5u-v=10
u=4v
5*4v-v=10
u=4v
20v-v=10
u=4v
19v=10\:19
u=4v
v=10\19
u=4*10\19=40\19
6.6x-3y=9
x+5y=-9,5
6x-3y=9
x=-9,5-5y
6(-9,5-5y)-3y=9
x=-9,5-5y
-57-30y-3y=9
x=-9,5-5y
-33y=9+57
x=-9,5-5y
-33y=66\:(-33)
x=-9,5-5y
y=-2
x=-9,5-5*(-2)
y=-2
x=-9,5-10
y=-2
x=-19,5
mam nadzieje ze pomoglem