Odpowiedź:
I. 5x-18/6= 7. |*6
5x-18= 42 |+18
5x= 60 |:5
x= 12
II. 6x +57/65=15. |*65
6x+57= 975 |-57
6x= 918 |:6
x= 153
III. (x+2)/9 +(x-1)/3= 1 |*9
x+2+ 3x-3= 9
4x-1=9 |+1
4x= 10 |:4
x= 2,5
IV. (x+1)/2 + (x-1)/3 =1/4 |*12
6x+6+ 4x-4= 3
10x+ 2= 3 |-2
10x= 1 |:10
x= 1/10
V. (2x+7)/2 - (3x-1)/3 = 1/2 |*6
6x+21- (6x -3) = 3
24=3
Równanie tożsamościowe
