Inputs
Outputs
Harder Inputs
Harder Outputs
Free For All
100

Find f(4) 

if f(x) = x + 3

(4)+3= 7

100

f(X) = x - 2 

Find the value of x when f(x)=3

3 = x - 2


5 = x

100

Find k(-2.3) 

if k(x) = 19.6 - x

19.6 - (-2.3)

21.9

100

f(x) = 6(6x + 6) - 5

Find x when f(x) = 1 + 6x

1 + 6x = 6(6x + 6) - 5

x = -1

100

k(x) = 34x + 95

Find x if k(x) = 3(14x + 9)

3(14x + 9) = 34x + 95

x = 8.5

200

Find g(8) 

if g(x) = 2x

2(8) =16

200

f(x) = -6x

Find the value of x when f(x) = -36

-6x= -36

x = 6

200

Find f(-4a) 

if f(x) = -10x - 9

-10(-4a) - 9

-40a - 9

200

g(x) = -7(-6 + 8x) + 3

Find x when g(x) = -16 + 5x

−16+5x=−7(−6+8x)+3

x = 1

200

Find f(-10) 

if f(x) = 4x - 5 + 3x - 2 - 7x

4(-10) - 5 + 3(-10) - 2 - 7(-10)

-7

300

Find k(10) 

if k(x) = 2x + 3

2(10) + 3

20 + 3= 23

300

k(x) = -9x - 2

Find x when k(x) = -47

-47 = -9x - 2

-45 = -9x

5 = x

300

Find h(x+1)

if h(x) = 20 + 6x

20 + 6(x+1)

20 + 6x + 6

6x + 26

300

p(x) = -10x + 3(8 + 8x)

Find x when p(x) = -6(x - 4)

−10x+3(8+8x)=−6(x−4)

x = 0


300

Find f(-2/3) 

when f(x) = 3x - 4 - 6x - 9x

3(-2/3) - 4 - 6(-2/3) - 9(-2/3)

4

400

Find g(20) 

if g(x) = 12 + x/4

12 + (20)/4

12 + 5 =17

400

f(x) = -17 + x/2.1

Find x if f(x) = -14.29

-14.29 = -17 + x/2.1

2.71 = x/2.1

5.7 = x

400

Find f(2x + 1) 

if f(x) = x + 3

(2x + 1) + 3

2x + 1 + 3

2x + 4

400

v(x) = 0.25x + 0.05(x + 3)

Find x when v(x) = 2.85?

0.25x + 0.05(x + 3) = 2.85

x = 9

400

Find m(3x - 4) 

if m(x) = 30 + 5(-2x - 3)

30 - 10x - 15

30 - 10(3x - 4) - 15

30 - 30x + 40 - 15

-30x + 55

500

Find f(10) 

if f(x) = 2x + 5x - 16

2(10) +5(10) - 16

20 + 50 - 16

70 - 16 = 54

500

Solve p(x) = 5(x - 15) + 3

Find x if p(x) = -132

-132 = 5 (x - 15) + 3

-132 = 5x - 75 + 3

-57 = 5x + 3

-60 = 5x

-12 = x

500

Find k(3x) 

if k(x) = 21 + 8(-2x - 5)

21 - 16x - 40

21 - 16(3x) - 40

-48x - 19


500

w(x) = 0.75(x + 20)

Find x when w(x) = 2 + 0.5(x - 2)

2 + 0.5(x - 2) = 0.75(x + 20)

x = -56

500

Find f(50)

if f(x) = 10(6 - x) - x/25

10 (6 - 50) - 50/25

10 (-44) - 2

-440 - 2 = -442