Question

Zad.1

a) 5(w+3)-63(w+1)=10

b) 6(x-7)-2(x-4)=14

Zad.2

a) x-1=23

b)7+x=31

c)-5y=-35

d)3x+1=25

Answer 1

Zadanie 1

 

a) 5(w + 3) - 63(w + 1) = 10

    5w + 15 - 63w - 63 = 10

    5w - 63w = 10 - 15 + 63

    -58w = 58 | : (-58)

    w = -1

 

b) 6(x - 7) - 2(x - 4) = 14

    6x - 42 - 2x + 8 = 14

    6x - 2x = 14 + 42 - 8

    4x = 48 | : 4

    x = 12

 

Zadanie 2

 

a) x - 1 = 23

    x = 23 + 1

    x = 24

 

b) 7 + x = 31

    x = 31 - 7

    x = 24

 

c) -5y = -35 | : (-5)

    y = 7

 

d) 3x + 1 = 25

    3x = 25 - 1

    3x = 24 | : 3

    x = 8

 

 

Answer 2

1. a)

5(w+3)-63(w+1)=10

5w+15-63w-63=10 /+63 /-15

5w-63w=10+63-15

-58w=58

w=-1

 

b)

6(x-7)-2(x-4)=14

6x-42-2x+8=14 /+42-8

4x=48 / :4

x=12

 

 

 

2.

a) x - 1 = 23

x = 23 + 1

 x = 24

 

 

b)7+x=31/-7

x=24

 

c)-5y=-35 / :(-5)

y=7

 

d)3x+1=25/-1

3x=24 /:3

x=8