The Difficulty of Numbers

Expressions and Equations

100

Solve for X 

3x + 5  = 20

     X= 5   

200

Combine the like terms 

-5m +5r -4m +2r

-9m + 7r 

300

Solve for x

30=5x+10

X=4

400

Simplify this expression

4(x+10)

4x + 40 

4x + 40

500

Solve for a

3a+10=2a+7

  a=-3

more Expressions and Equations

100

solve for X 

 9 - 2x = 23

  X = -7

200

combine like terms

10x² - 8x + 1 - 2x + 11 - 5x²

5x² - (-10x) + 12

slope

100

Find the slope

y=11x+7

Slope is 11

200

What is the y-intercept

y=7x-13

Y-intercept is -13

300

 Find the slope from these 2 points

(5,4)(8,2)

-2/3

400

Change this equation to slope-intercept form (y=mx+b)

9x+3y=12

 y= -3x+4

Systems of Linear Equations

100

Find the point of intersection

y=4x-8

X=4

200

Solve using the substitution method

y=5

x+3y=8

  x = -7

300

Find the point of intersection.

y=3x-1

y=6x-2

 ⅓=x

y=3(⅓)-1

y=1-1

y=0

400

 Solve using the substitution method

x=5

2x+3y=40

  y=10