Odpowiedź :
a) 7x-9=5 |+9
7x=14 |:7
x=0
b) 9x - 4 = 8x + 5
9x-8x=5+4
x=9
c) 7(x + 2) - X= 5 (x-2)
7x+14-x=5x-10
6x-5x=-10+14
x=4
d) 4x - 3(3x - 5) = 6x + 4
4x-9x-15=6x+4
-5x-6x=4+15
11x=19 |:11
x=1 8⁄11
a) 7x-9=5 |+9
7x=14 |:7
x=0
b) 9x - 4 = 8x + 5
9x-8x=5+4
x=9
c) 7(x + 2) - X= 5 (x-2)
7x+14-x=5x-10
6x-5x=-10+14
x=4
d) 4x - 3(3x - 5) = 6x + 4
4x-9x-15=6x+4
-5x-6x=4+15
11x=19 |:11
x=1 8⁄11