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x=57-75
x= -18
b) 1 2/3 + y = 2 3/4
y=2 3/4-1 2/3
y= 2 9/12- 1 8/12
y= 1 8/12
c) x - 34 = 35
x= 35+34
x=69
d) 3x = 2x +1/7
3x-2x=1/7
x= 1/7
e) 3 - x = 2x
3=3x /:3
x=1
f) 5y = 13 /:5
y= 2 3/5
g) 1/7x = -2 /*7
x= -14
h) -7b = 7/8 /:(-7)
b= 7/8*1/7
b= 7/56
i) 7x + 7 = 35
7x=28 /:7
x=4
j) 2 - x = 5 - 2x
x= 5-2
x=3
k)69 - x = x + 96
-2x= 96-69
-2x=27 /:(-2)
x= -13,5
l)1/2x + 5 = x + 8
-1 1/2x=3
- 3/2x=3 /*2
-3x=6 /:(-3)
x= -2
x=57-75
x=18
b)1 1/2+y=2 3/4
y=2 3/4-1 1/2
y=1 1/4
c)x - 34=35
x=35+34
x=69
d)3x=2x+1/7
3x-2x=1/7
x=1/7
e) 3 - x = 2x
-x-2x=-3
-3x=-3/:(-3)
x=1
f) 5y = 13/:5
y=2,6
g) 1/7x = -2/:1/7
x=-14
h) -7b = 7/8/:(-7)
b=-1/8
i) 7x + 7 = 35
7x=35-7
7x=28/:7
x=4
j) 2 - x = 5 - 2x
-x+2x=5-2
x=3
k)69 - x = x + 96
-x-x=96-69
-2x=27/:(-2)
x=-13,5
l)1/2x + 5 = x + 8
1/2x-x=8-5
-1/2x=3/:(-1/2)
x=-15
x=57-75
x=-18
b) 1 2/3 + y = 2 3/4
y=2 3/4+1 2/3
y=4 5/12
c) x - 34 = 35
x=35+34
x=69
d) 3x = 2x +1/7
3x-2x=1/7
x=1/7
e) 3 - x = 2x
-x-2x=3
-3x=3 :[-3]
x=1
f) 5y = 13 :5
y=2,6
g) 1/7x = -2 :1/7
x=-14
h) -7b = 7/8 :-7
b=-1/8
i) 7x + 7 = 35
7x=35-7
7x=28
x=4
j) 2 - x = 5 - 2x
-x+2x=5-2
x=3
k)69 - x = x + 96
-x-x=96-69
0x=27 niemozliwe
l)1/2x + 5 = x + 8
1/2x-x=8-5
-1/2x=3 :-1/2
x=-6