solving equations

Solve for y:
5x - y = 16

• -y = 5x + 16
• y = 5x + 16
• x = 5y - 16
• y = 5x - 16

ax + c = R
(solve for x) 

• ax = R + c
• ax = R - c
• x = a(R-c)
• x = (R-c) / a 

Solve the equation for w.  
^{x = w / a}

• w = a / x
• w = x / a
• w = ax
• x = wa

Which expression represents the value of x in the equation:
dx + e = f

• x = (f + e)/d
• x = (f - e)/d
• x = d/(e - f)
• x = d/(e + f)

Solve:
6(5x - 3) + 2 = 14

• 2
• .5
• -1
• 1

Each month Mark's phone company charges a flat fee of $12 plus $0.05 per minute. His bill for last month was $18. How many minutes did Mark talk on the phone last month?

• 120

• 100

• 350

• 600

• -32

• -16

• -10

• 32

• f= 4b + 12

• f= 4b -12

• f= 1/4 b +12

• b = 4f + 12

Solve for x:
4(1-x)+3x=-2(x+1)

• x = -6
• x = 6
• x = 3

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

• x = 5

• x = 2

• x = -2

• x = 8