Solve for c.

a(c + b)=d

A. c = d + ab / a

B. c = d − ab/b

C. c = d − ab/a

D. c = ab − d/a


Solve for b.

d = 3a + 3b

A. b = 3a−d/3

B. b = d−3a/3

C. b = d − 3a

D. b = d − 3a/ a


The formula for a trapezoid relates the area A, the two bases, a and b, and the height, h.

A = h(a+b)/2

Solve for b.



b=2A−a/h

b=Ah/2 − a

b=2A/h − a

b=2A/h + a

The formula for the perimeter of a rectangle is P = 2(l+w).

Solve for l.

l = 2P − w

l = p−w/2

l = P/2 + w

l = p/2 − w