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x/3-y/2=2 1/3 / *6
3x+2y=8 / *2
2x-3y=14 / *(-3)
6x+4y=16
-6x+9y=-42 / +
13y=-26 / :13
y=-2
3x=8-2*(-2)
3x=8+4
3x=12 / :3
x=4
b. 3/5x+1/2y=2 / *10
1/2(2x-y)=2 / *2
6x+5y=20
2x-y=4 / *5
6x+5y=20
10x-5y=20 / +
16x=40 / :16
x=2,5
6*2,5+5y=20
5y=20-15
5y=5 / :5
y=1
x/3-y/2=2 1/3 / *6
3x+2y=8 / *2
2x-3y=14 / *(-3)
6x+4y=16
-6x+9y=-42 / +
13y=-26 / :13
y=-2
3x=8-2*(-2)
3x=8+4
3x=12 / :3
x=4
3/5x+1/2y=2 / *10
1/2(2x-y)=2 / *2
6x+5y=20
2x-y=4 / *5
6x+5y=20
10x-5y=20 / +
16x=40 / :16
x =2,5
6*2,5+5y=20
5y=20-15
5y=5 / :5
y=1
Mam nadzieję, że czytelne;)