Odpowiedź:
x-2x=1-3
-3x = -2 /:-3
x = 2/3
spr:
3-x=2x+1
3 -2/3= 2*2/3 +1
2 1/3 = 4/3 +1
2 1/3 = 1 1/3 +1
2 1/3 = 2 1/3
L=P
b) 5x-5=16-2x
5x + 2x =16+5
7x = 21 /:7
x = 3
5x-5=16-2x
5*3-5=16-2*3
15-5=16-6
10=10
c)1/2x+3=x-3
1/2x -x =-3-3
-1/2x=-6 /*-2
x =12
1/2x+3=x-3
1/2*12 +3 = 12 -3
6+3 = 9
9=9
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Odpowiedź:
x-2x=1-3
-3x = -2 /:-3
x = 2/3
spr:
3-x=2x+1
3 -2/3= 2*2/3 +1
2 1/3 = 4/3 +1
2 1/3 = 1 1/3 +1
2 1/3 = 2 1/3
L=P
b) 5x-5=16-2x
5x + 2x =16+5
7x = 21 /:7
x = 3
spr:
5x-5=16-2x
5*3-5=16-2*3
15-5=16-6
10=10
L=P
c)1/2x+3=x-3
1/2x -x =-3-3
-1/2x=-6 /*-2
x =12
spr:
1/2x+3=x-3
1/2*12 +3 = 12 -3
6+3 = 9
9=9
L=P
Szczegółowe wyjaśnienie: