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x/3-y/2 = 2⅓
3x/6 + 2y/6 = 8/6 /*6
2x/6 - 3y/6 = 14/6 /*6
3x + 2y = 8
2x + 3y = 14
x = 2⅔ - ⅔y
2(2⅔-⅔y) + 3y = 14
x = 2⅔ - ⅔y
16/3 - 4/3y + 3y = 14 /*3
x = 2⅔ - ⅔y
-y = 26
y= -26
x = 8/3 - 2/3(-26) = 8/3 + 52/3 = 60/3 = 20
2)
3/5x + 1/2y = 2
1/2(2x-y) = 2
3/5x + 1/2y = 2
x - 1/2y = 2
3/5x + 1/2y = 2
x = 2 + 1/2y
3/5(2+1/2y) + 1/2y = 2
x = 2 + 1/2y
6/5+3/10y + 1/2y = 2
x = 2 + 1/2y
4/5y = 4/5
x = 2 + 1/2y
y=1
x=2+1/2=2,5
3)
x+2 / 5- 2y=5 /*5-2y
x - y+2 / 6 = 3 /*6
x+2=25-10y
6x - y+2 = 18
x=23-10y
6(23-10y) - y+2 = 18
x=23-10y
138-60y-y+2 = 18
x=23-10y
-61y = -122
y=2
x=3