Equations

Substitution

100

y=9+x 

If x=2, what is y?

11

200

y=3x

If x=8, what is y?

24

300

y=2x+1

x=-2

-3

400

y=-1.5-3x

If x=3, what is y?

-10.5

500

Area of triangle = (b x h)/2

If the area of the triangle is 50, the base of the triangle is 25, what is the height of the triangle?

4

One-step equations

100

Solve for x:

6+x=12

6

200

Solve for t:

2t=14

t=7

300

Solve for y:

8y-2=22

3

400

Solve for x:

7-2x=-15

x=11

500

Solve for t:

t² + 4 = 29

5

Two-step equations

100

Solve for x:

5x+6x=22

x=2

200

Solve for t:

6t=2t-8

t=-2

300

Solve for x:

2(x+2)=0

x=-2

400

Solve for y:

12y + 7 = 5y + 21 

y=2

500

Solve for x:

8(x+2) = 2(3x+12)

x=4

Formulas

100

What is the formula for area of a rectangle?

Area = length x width

200

Area = l x w

If length = 7 and width = 10, what is the area?

Area =70

300

Area of a circle = pi x r²
Calculate the area of a circle with a radius of 4.

50.27

400

v = u + at

Calculate v when u=2, a=-4 and t=1

-2

500

v²=u²+2as

Calculate v when u=-2, a=5 and s=0.5

v=3