Ch 2 Review

absolute value equations

100

|x-3|=8

x=11,-5

200

|2x-3|=5

x=4,-1

300

|2x-5|+2=13

x=8,-3

400

3|5x+4|=24

x=4/5, -12/5

500

6|4x+8|-9=63

x=1,-5

Proportions

100

10/5 = n/10

n=20

200

6/(b-1) = 9/7

b = 17/3

300

4/(m-8) = 8/2

m = 9

400

(p+10)/(p-7) = 8/9

p=-146

500

(n-5)/(n+8) = 2/7 

n = 51/5

Solving for Y

100

y+2x=8

y=8-2x

200

2y+3x=10

y=-3/2x + 5

300

y+1=2(6x+8)

y=12x+15

400

4y-2x=13x+2+y

y = 5x + 2/3

500

5y+7 = 3(2x+4) +8x -2

y = 14/5x + 3/5

Solving Formulas

100

bh + r =c

Solve for r

r = c - bh

200

bh - c = r

Solve for h

h = (r+c)/b

300

A = lwh

Solve for w

w = A/lh

400

A +f = lw +n

Solve for l

l = (A+f+n)/w

500

a = c/d +e

Solve for c

c = d(a-e)

Variables on both sides

100

2x = x+3

x=3

200

3x + 4 =5x -2

x = 3

300

4x + 2 = 2(x+5) 

x = 4

400

5x - 3 = 2(2x+1) - 3x

x = 5/4

500

2(3x+2) +1 = 3(4x-2) +2x

x = 11/8