Question

1)Rozwiąż równania.
a)-5x-5=5
b)1/2x+4=-6
c)0,6-3/4x=-1/3
d)3x-4=5x+2
e)7-2x=7x-2

Answer 1

A)-5x-5=5
-5x = 5+5
-5x = 10 /:-5
x = -2

b)1/2x+4=-6
1/2x=-6-4
1/2x = -10 /:1/2
x = -5

c)0,6-3/4x=-1/3
-3/4x=-1/3-0,6
-3/4x=-8/10 / :-3/4
x= 16/15
x = 1 i 1/15

d)3x-4=5x+2
3x-5x=2+4
-2x=6 /:-2
x = -3

e)7-2x=7x-2
-2x-7x=-2-7
-9x = 9 / : -9
x = -1

Answer 2

A)-5x-5=5
-5x = 5+5
-5x = 10 |:(-5)
x = -2

b)1/2x+4=-6
1/2x = -6-4
1/2x = -10 |*2
x = -20

c)0,6-3/4x=-1/3
-3/4x = -1/3 - 6/10
-3/4x = -10/30 - 18/30
-3/4x = -28/30 |:(-4/3)
x = 56/45

d)3x-4=5x+2
3x-5x = 2+4
-2x = 6 |:(-2)
x = -3

e)7-2x=7x-2
-2x-7x = -2-7
-9x = -9 |:(-9)
x = 1