Odpowiedź:
7x = 112
x= 112 : 7
x= 16
spr.
7x = 112
L= 7x = 7 * 16 = 112
P= 112
112 = 112
L=P
5x - 3 = 17
5x = 17 + 3
5x = 20
x= 20 : 5
x= 4
spr.
5x - 3 = 17
L= 5x - 3= 5*4 - 3= 20 - 3= 17
P= 17
17=17
L=P
4x + 2 = 13
4x = 13 -2
4x = 11
x= 11 : 4
x= 2,75
spr.
4x + 2 = 13
L= 4x + 2 = 4* 2,75 + 2 = 11 + 2 = 13
P = 13
13 = 13
L=P
2x - 7 = 20
2x = 20 + 7
2x = 27
x= 27 : 2
x= 13,5
spr.
2x - 7 = 20
L= 2x - 7= 2*13,5 - 7= 27 - 7 = 20
P= 20
20 = 20
L=P
Szczegółowe wyjaśnienie:
