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x = -18
b) 1/1,2 + y = 2/3,4 /x3,4
3,4/1,2 + y = 2
2,83 + y = 2 /-2,83
y = -0,83
c) x - 34 = -35 /+34
x = -1
d) 3x = 2x + 1/7
x = 1/7
e) 3 - x = -2x
3 = -x
x = -3
f) 5y = 13
y = 13/5
g) 1/7x = -2 /x7
x = -14
h) -7b = 7/8 /:7
-b = 1/8
b = -1/8
i) 7x + 7 =35
7x = 28
x = 4
j) 2 - x = 5 - 2x
-x = 3 - 2x
x = 3
k) 69 - x = x + 96
-x = x + 27
-2x = 27 /:(-2)
x = -13,5
l) 1/2x + 5 = x + 8/x2
x + 5 = 2x + 16
x = 2x + 11
-x = 11
x = -11
Powinno być dobrze, a jak się gdzieś pomyliłam to sory ;)