Question

rozwiąż rownania :

a) x/3 +1 = 5/6+ x/2

b) 2x-3 / 4 = 1/2 + x

c) x+2/9 + x-1/3 = 1

d) 2x+3/5 = 2-x/3 + x

e) x/2 = 2/5 ( 4-x) - 4

f) 2x- 3x+5/4 = -1/4x- 1

Bardzo ważne !!!

Answer 1

a)x/3+1=5/6+x/2 |*6

2x+6=5+3x

2x-3x=5-6

-x=-1 |*(-1)

x=1

b)2x-3/4=1/2+x

2x-x=1/2+3/4

x=5/4

x=1 1/4

c)x+2/9+x-1/3=1

x+2/9+x-3/9=1

2x=1-2/9+3/9

2x=10/9 |:2

x=10/9*1/2

x=10/18

x=5/9

d)2x+3/5=2-x/3+x |*3

6x+9/5=6-x+3x

6x+x-3x=6-9/5

4x=4 1/5|:4

x=21/5*1/4

x=21/20

x=1 1/20

e)x/2=2/5(4-x)-4

x/2=8/5-2/5x-4|*10

5x=16-4x-40

5x+4x=16-40

9x=-24|:9

x=-24/9

x=-2 6/9

x=-2 2/3

f)2x-3x+5/4=-1/4x-1

2x-3x+1/4x=-1-5/4

-3/4x=-2 1/4|:(-3/4)

x=9/4*4/3

x=3