Pre-Algebra Review

Solving Equations

100

x + 5 = 12

x = 7

200

3x = 15

x = 5

300

-5x + 5 = 20

x =-3

400

3x + 2x = -40

x = -8

500

2(x - 4) =-10

x= -1

Exponents

100

a² x a³

a⁵

200

8z⁸ / 4z⁴

2z⁴

300

(2x³)²

4x⁶

400

x^-4 /x³

1/x⁷

500

x^-4y²  /xy⁴

1/x⁵y²

Inequalities

100

2x < -4

x < -2

200

2x + 2 > 8

x >3

300

-3x < 9

x>-3

400

Draw the symbol for greater than 

>

500

-3x + 3 > x - 5

x<2

Fractions

100

1/2 + 1/8

5/8

200

3/4 + 1/8

7/8

300

3/4 x 1/5

3/20

400

5/8 / 1/4

5/2

500

1 1/2  x  3/5

9/10

Polynomials

100

(2x²+ 5x+1) +(x²+3x+ 4)

3x²+8x+5

200

(3x² - 5x+ 7)+(-2x²-6x-2)

x²-11x+5

300

(4x²+4x-5)-(2x²-3x+2)

2x²+7x-7

400

(x+5)(x-4)

x²+x-20

500

(2x-2)(x+3)

2x²+4x-6