Question

Rozwiąż równania.

a) -3x = 2x - 10

b) 2x - 2 = 7 - x

c) 10 + 4 - 2x

d) -(2x - 1) = 4

e) 2(x + 1) = x

f) 2t - (3t + 1) = 6

g) -(4 + x) = 2(3 - x)

h) 3(y+6) - y = 2(y + 9)

i) (x - 7) - 2(3x + 5) = 3

Plx szybko i z góry THX

Answer 1

a) -3x-2x = -10

- 5x = -10/:(-5)

x = 2

 

b) 2x+x= 7+2

3x=9/3

x = 3

 

c) -2x = -10-4

-2x = -14/:(-2)

x = 7

 

d) -2 x = 4-1

-2x = 3/:(-2)

x = -1,5

 

e) 2x -x = -2

x = -2

 

f) 2t - 3t = 6+1

-t = 7:(-1)

t = -7

 

g) -x +2x= 6 +4

x = 10

 

h) 3y-y -2y= 18 -18

0 = 0

 

i) x- 6x = 3+7 +10

-5x = 20/:(-5)

x = -4

Answer 2

a) -3x = 2x - 10

-3x-2x=-10

-5x=-10/(-5)

x=2

b) 2x - 2 = 7 - x

2x+x=7+2

3x=9/3

x=3

c) 10 + 4 - 2x

-2x=-14/(-2)

x=7

d) -(2x - 1) = 4

-2x+1=4

-2x=4-1

-2x=3/(-2)

x=-3/2

x=-1.5

e) 2(x + 1) = x

2x+2=x

2x-x=-2

x=-2

f) 2t - (3t + 1) = 6

2t-3t-1=6

-t=6+1

-t=7/(-1)

t=-7

g) -(4 + x) = 2(3 - x)

-4-x=6-2x

-x+2x=6+4

x=10

h) 3(y+6) - y = 2(y + 9)

3y+18-y=2y+18

3y-2y-y=18-18

0=0

i) (x - 7) - 2(3x + 5) = 3

x-7-6x-10=3

-5x=3+17

-5x=20/(-5)

x=-4