Equations and Formulas

Solving the formula P = 2L + 2W for W is not equivalent to which equation?

• (P-2L)/2 = W

• (P/2) - (2L/2) = W

• (1/2)P - L = W

• P - (1/2)L = W

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

• w = a / x

• w = x / a

• w = ax

• x = wa

Solve for x. 
5y = x / 8w

• x = 40yw

• x = 85wy

• x = 5y - 8w

• x = 5y / 8w

Solve for n:
2m - n = 8

• n = 2m - 8

• n = -2m - 8

• n = 2m + 8

• n = -2m + 8

Which expression represents the value of e in the equation:

• e = (f + e)/d

• e = (f - x)/d

• e = d/(x - f)

• e = f-dx

Solve:
C = 2πr, for r

• C/(2π) = r

• C + 2π = r

• C - 2π = r

• 2πC = r

Solve for b

y = mx + b

• y - mx = b

• y + mx = b

• y / mx = b

• ym / x = b

Rewrite this formula and solve for the variable y. 9x + y = 27

• y = 9x - 27

• y = 3 / x

• y = 3x

• y = −9x + 27

Rewrite this formula and solve for the variable y. 7y = −28x - 56

• y = −4x + 8

• y = 4x + 8

• y = −4x - 8

• y = 4x - 8

Rewrite this formula and solve for the variable y. 6x + 3y = 48

• y = 2x - 16

• y = -2x + 16

• y = -2x - 16

• y = 2x + 16