1.Rozwiąż równania :
a) x + 75 = 57
b) 1 2/3 + y = 2 3/4
c) x - 34 = -35
d) 3x = 2x = 1/7
e) 3 - x = 2x
f) 5y = 13
g) 1/7x = -2
h) -7b = 7/8
i) 7x + 7 = 35
j) 2 - x = 5-2x
k) 69 - x = x =96
l) 1/2x + 5 = x + 8
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a) x + 75 = 57
x=-18
b) 1 2/3 + y = 2 3/4
y=11/4-5/3
y=33/12-20/12
y=13/12
c) x - 34 = -35
x=-1
d) 3x = 2x - 1/7
x=-1/7
e) 3 - x = 2x
3=3x
x=1
f) 5y = 13
y=13/5
y=2.6
g) 1/7x = -2
x=-14
h) -7b = 7/8
b=-1/8
i) 7x + 7 = 35
7x=28
x=4
j) 2 - x = 5-2x
x=3
k) 69 - x = x -96
165=2x
x=82.5
l) 1/2x + 5 = x + 8
-1/2x=3
x=-6
a] x+75=57
x=57-75
x= -18
b] 1 2/3+y=2 3/4
y=11/4-5/3
y=1 1/12
c]x-34= -35
x= -35+34
x= -1
d]???
e]3-x=2x
-x-2x= -3
-3x= -3 /*-3
x=1
f] 5y=13 /:5
y=13/5=10 2/3
g]1/7x= -2 /*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
-2x=27 /:-2
x= -13 1/2
l]1/2x+5=x+8 /*2
x+10=2x+16
x-2x=16-10
-1x=6 /*[-1]
x= -6
tam gdzie robilam znak? to jest blad jak byl pisany przyklad