Isolating Variables in Formulas

What is the first step to solve the equation 2x = 6 for x?

• Add 2 to both sides.

• Subtract 2 from both sides.

• Multiply both sides by 2.

• Divide both sides by 2.

To solve the formula d = rt for t, what operation should be performed to isolate t?

• Multiply both sides by r.

• Divide both sides by r.

• Add r to both sides.

• Subtract r from both sides.

If the formula for distance is d = rt, what is the formula for time (t)?

• t = d * r

• t = r / d

• t = d / r

• t = d - r

To isolate 'h' in the formula A = 1/2 bh, what is the first step to eliminate the fraction?

• Divide both sides by 1/2.

• Multiply both sides by b.

• Multiply both sides by 2.

• Subtract 1/2 from both sides.