Rozwiąż następujące równania:
Zad 5.3
a) x 4
---- = ---
7 5
b) 3,6 3
------ = ---
6 4
c) 0,8
------- = x
7 --------
2,8
d) 2,4 3
------ = -----
3,6 x
e) x-1 1
----- = ---
2 3
f) 4 3
---- = ----
x x+2
g) x
--- = 3-x
1 ------
---- 2
2
h) 4,5-x 3
-------- = ----
x 2
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a) x 4
---- = ---
7 5
5x=28
x=²⁸/₅
x=5³/₅
c) 0,8
------- = x
7 --------
2,8
7x=2.24
x=0.32
d) 2,4 3
------ = -----
3,6 x
2.4x=10.8
x=4.5
e) x-1 1
----- = ---
2 3
3(x-1)=2
3x-3=2
3x=5
x=⁵/₃
x=1²/₃
f) 4 3
---- = ----
x x+2
4(x+2)=3x
4x+8=3x
x=-8
g) x
--- = 3-x
1 ------
---- 2
2
½(3-x)=2x
1½-½x=2x
1½=2x+½x
1½=2½x
x=³/₅
h) 4,5-x 3
-------- = ----
x 2
2(4.5-x)=3x
9-2x=3x
5x=9
x=⁹/₅
x=1⁴/₅