Question

e) 13+2x=3

f) -7=5x+1

g) 7x-21=5x

h) 6y-13=-52

i)4x-4=3

j)3c+2=-70

k)33-4x=4x

l) 5-10x=-2x

Answer 1

13 + 2x = 3

2x = 3 - 13

2x = -10/:2

x = -5

 

-7 = 5x + 1

-5x = 1 + 7

-5x = 8/:(-5)

x = -1,6

 

7x - 21 = 5x

7x - 5x = 21

2x = 21/:2

x = 10,5

 

6y - 13 = -52

6y = -52 +13

6y = -39/:6

y = - 6,5

 

4x - 4 = 3

4x = 3 + 4

4x = 7/:4

x = 1,75

 

3c + 2 = -70

3c = -70 -2

3c = -72/:3

c = -24

 

33 - 4x = 4x

-4x - 4x = -33

-8x = -33/:(-8)

x = 4 1/8

 

5 - 10x = -2x

-10x + 2x = -5

-8x = -5/:(-8)

x = 5/8

 

:)