Pre Algebra

Combine Like Terms

100

1-3x-4

-3x-3

200

3x-4-5x

-2x-4

300

4x+7-9+9x

13x-2

400

8x-11+13-3x+3y

5x-3y+2

500

12y+16x-13+8x-4y-6

24x+8y-19

Adding Fractions

100

2/3 + 4/6

4/3

200

4/5 + 8/15

4/3

300

8/2 + 11/8

43/8

400

12/5 + 9/4

93/20

500

14/8 + 5/9

83/36

Solving Variables on Both Sides

100

2x = 4+6

x=5

200

 8x - 3 = -13

x= -5/4

300

6x - 11 + 14x = 9

x=1

400

x + 7 = 14 - 4x + 3

x=2

500

10x + 5x -3 = 27

x=2

Mixture

100

 4/5 - 6/15

2/5

200

6(3x + 4) = -7x + 13

x= -11/25

300

12/7 x 4/7

48/49

400

3(4x + 6) = 7 - 13 + 7x

x= -24/5

500

Square root of 81

9