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

PROSZE PROSZE DAJE NAJ

Answer 1

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

10-4 = -2x

6 = -2x /:(-2)

x = -3

 

d)-(2x-1)=4

-2x+1 = 4

-2x = 4 -1

-2x = 3 /:(-2)

x = -3/2

x = -1 1/2

 

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-y-2y = 18-18

0 = 0

Równanie tożsamościowe

 

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

x-7-6x-10 = 3

x-6x = 3+7+10

-5x = 20 /:(-5)

x = -4

Answer 2

umiem tylko te;

a)3x+2x=10

5x=10//5

x=2

c)10+4=2x

14=2x

2x=14//2

x=7

pozdrawiam