Algebra - Solve for x:

1-Step: 13 - x = -21  |  3x = 12  |  x/13 = -4 | 5/7 x = 1/4 | 3/5 x = 2 2/3

2-Step: 2x + 5 = 15 | 4x + 1 = 25 | -3x - 7 = -17 | 2.5x - 0.2 = 10.8

Multi-Step: 5(2x +3) = 85 | 2(x-4) =  2x - 6 | 3x + 7 = 9x - 2 | 5x + 11 - 3x = 37 | 4(x+ 7)  - 2 = 2 - 8x | 3x + 4 + 5x = 4(2x + 1)

Quadratic:  x^2 + 6x + 8 = 0 | x^2 - 7x + 12 = 0 

Algebra - Factor:

Factor: x^2 + 5x + 4 | x^2 + 6x + 8

Arithmetic - Fractions:

Multiply: 3/5 x 2/9 | 4/7 x 5/12 | 2/3 x 9/14

Division: 3/5 ÷ 7/10 | 2/3 ÷ 5/12