PA - Ch7

Two-Step Equations

100

2a - 7 = -15

a = -4

200

3 = -6x + 15

x = 2

300

c/4 + 10 = 22

c = 48

400

1.5y + 3.4 = 7.9

y = 3

500

2/3y - 9 = 5

y = 21

More Equations

100

8m - 5m = 15

m = 5

200

6 - 2y - y = 12

y = -2

300

2(b - 7) = 16

b = 15

400

-2(5 + 6c) + 16 = -90

c = 8

500

Find four consecutive integers with a sum of -66.

-18, -17, -16, -15

Even More Equations

100

1.2x + 2.7 = 6.3

x = 3

200

10 = 5 + 4/5w

w = 6 1/4 

300

2y + 7 = y - 8

y = -15

400

2/3q + 5 = 3/4

q = -6 3/8

500

3.75x - 5.1 = 6.12

x = 2.992

Inequalities

100

2a - 3 > 11

a > 7

200

9y + 13 < -14

y < -3

300

-6c + 12 > 8

c < 2/3

400

23 < 7 - 4x

x < -4

500

8/9x + 5 < -3

x < -9

Other

100

P = 2L + 2W

solve for L

L = (P - 2W) / 2

200

a = b - 2c

solve for b

b = a + 2c

300

$150 is deposited at an interest rate of 4.5% for 2 years.

What is the simple interest?

$13.50

400

$8000 at 2% compounded annually for 3 years.

Find the balance.

$8,489.66

500

$22,000 at 3% compounded semiannually for 2 years.

Find the balance.

$23,350.00