4. Rozwiąż równania:
a) -5+x=10 I+5 x-34=-35 4x=3x-5
x=15 ........... .........
b) 64+2x=44+x 3-x=-2x 4+3x=2+2x
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a) x=1 x=-5
x=-20 x=-3 x=-2
Nie wiem, czy w tym punkcie a) jest 10 / +5, czy 10l + 5 więc zrobię 2 obliczenia.
a ) 1) -5 + x = 10 / +5
x = 15
-5 + 15 + 5 = 10 + 5
15 = 15
-5 + x = 10l +5
x = 15
-5 + 15 = 10l + 5
-5 + 15 - 5 = 10l
-10 + 15 = 10l
5 = 10 l / : 10
l = 5/10
l = 1/2
l = 0,5
2) x - 34 = - 35
x = -35 + 34
x = -1
3) 4x = 3x - 5
4x - 3x = -5
x = -5
b) 1) 64 + 2x = 44 + x
2x - x = 44 - 64
x = - 20
2) 3 - x = - 2x
- x + 2x = -3
x = -3
3) 4 + 3x = 2 + 2x
3x - 2x = 2 - 4
x = -2