Algebra

Simplifying

100

2a + 19a = 

21a

200

25ab + 3b - 14ba + 13b

11ab + 16b

300

6a X 8ab

48a^2b

400

2ab X 6bc X 7c^2

84ab^2c^3

500

56a^3cd/40ac^2

7a^2d/5c

Substituting

100

If x = 4

What is 2x?

8

200

If x = 5,

what is 7x - 13

22

300

If x = 3 and y = 7,

What is 8x + 2y?

38

400

If x = 12 and y = 6,

what is y^2 - x/4

33

500

If x = - 2, y = 9 and z = 4,

what is (y^2 + z^2 - 1) / x

- 48

Solving

100

x - 23 = 6

x = 29

200

x/12 = 9

x = 108

300

4x + 5 = 29

x = 6

400

25 - x/3 = 13

x= 36

500

5x - 2 = 3x - 4

x = -1