Question

1. 3k − 8 = 7 2. 8b + 9 = −15 3. 8 = 3x − 13 4. 6p + 22 = 4 5. 84 = 51 + 11c

Answer 1

===> Exercise 1

• 3k − 8 = 7

Add 8 to both sides.

• 3k = 7 + 8

Add 7 and 8 to get 15.

• 3k = 15

Divide both sides by 3.

• k = 15 / 3

Divide 15 by 3 to get 5.

• k=5 ===> Answer

===> Exercise 2

• 8b + 9 = −15

Subtract 9 from both sides.

• 8b= −15 − 9

Subtract 9 from −15 to get −24.

• 8b = −24

Divide both sides by 8.

• b = -24 / 3

Divide −24 entre 8 para obtener −3.

• b=−3 ===> Answer

===> Exercise 3

• 8 = 3x − 13

Swap the sides so that all the terms of the variables are on the left side.

• 3x −13 = 8

Add 13 to both sides.

• 3x = 8 + 13

Add 8 and 13 to get 21.

• 3x = 21

Divide both sides by 3.

• x = 21 / 3

Divide 21 by 3 to get 7.

• x = 7 ===> Answer

===> Exercise 4

• 6p + 22 = 4

Subtract 22 from both sides.

• 6p = 4 − 22

Subtract 22 from 4 to get −18.

• 6p = −18

Divide both sides by 6.

• p = -18 / 6

Divide −18 entre 6 para obtener −3.

• p = −3 ===> Answer

===> Excercise 5

• 84 = 51 + 11c

Swap the sides so that all the terms of the variables are on the left side.

• 51 + 11c = 84

Subtract 51 from both sides.

• 11c = 84 − 51

Subtract 51 from 84 to get 33.

• 11c = 33

Divide both sides by 11.

• c = 33 / 11

Divide 33 by 11 to get 3.

• c = 3 ===> Answer

Answer 2

Solution 1 :-

>> 3k - 8 = 7

>> 3k = 7 + 8

>> 3k = 15

>> k = 15 / 3

>> k = 5

Solution 2 :-

>> 8b + 9 = -15

>> 8b = -15 - 9

>> 8b = -24

>> b = -24 / 8

>> b = -3

Solution 3 :-

>> 8 = 3x - 13

>> 3x = 13 + 8

>> 3x = 21

>> x = 21 / 3

>> x = 7

Solution 4 :-

>> 6p + 22 = 4

>> 6p = 4 - 22

>> 6p = -18

>> p = -18 / 6

>> p = -3

Solution 5 :-

>> 84 = 51 + 11c

>> 11c = 84 - 51

>> 11c = 33

>> c = 33 / 11

>> c = 3