Question

Rozwiąż równanie a) 2x+5=14,8+(x-3) b) 1/4x-(4+1/2x)=-2 c) 2(3-x)-4(x-5)=2x+2 d) 1/3*(-6x+9)-4=-5(x+1) e) 0,2*(10-5x)=3+2(x-1) f) 37=(20-4x)*0,5-7x

Answer 1

a) 2x+5=14,8+(x-3)

2x+5=14,8+x-3

2x-x=-5+14.8-3

x=6.8

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

1/4x-4-1/2x=-2

0.25x-0.5x=-2+4

-0.25x=2/(-0.25)

x=-8

c) 2(3-x)-4(x-5)=2x+2

6-2x-4x+20=2x+2

-6x+26=2x+2

-6x-2x=2-26

-8x=-24/(-8)

x=3

d)1/3*(-6x+9)-4=-5(x+1)

-6/3x+9/3-4=-5x-5

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

-2x+5x=-5+4

3x=-1/3

x=-1/3

e) 0,2*(10-5x)=3+2(x-1)

2-x=3+2x-2

-x-2x=-2-2+3

-3x=1/(-3)

x=-1/3

) 37=(20-4x)*0,5-7x

37=10-2x-7x

9x=-37+10

9x=-27/9

x=-3