Question

Rozwiaz rownanie A) 12y -(y +5) = 10y - 1 B) 2 (u -5)+ 15= 3(u-4) +10 C) -3 (y/3 + 1) -2=4 (1-y) D) 2 (3a -2) -6= 4,5 (2a -1) +1/2 Z gory dziekuje :)

Answer 1

A) 12y-(y+5) = 10y - 1

12 y -y -5 = 10y - 1

12 y -y -10 y = -1+5

y = 4

 

B) 2(u-5)+15= 3(u-4)+10

2u - 10 + 15 = 3u -12 + 10

2u -3u = -12 + 10 +10-15

-u = -7/*-1

u = 7

 

C) -3(y/3 +1) - 2= 4(1-y)

-y -3 -2 = 4 -4y

-y + 4y= 4+3+2

3y = 9/:3

y = 3

 

D) 2(3a-2)-6= 4,5(2a-1)+1/2

6a - 4 -6 = 9a - 4,5 + 1/2

6a - 9a = -4,5 + 1/2 +4 +6

-3a = -4 i 1/2 +1/2 + 10

-3a = 6/;(-3)

a = -2