To solve Lance’s equation, 2(x + 10) = 60, first

A.subtract 10 from both sides

B.multiply both sides by 2

C.divide both sides by 2

D.add 10 to both sides


Then

A.subtract 10 from both sides

B.add 10 to both sides

C.multiply both sides by 2

D.divide both sides by 2


Solve Lance's equation, 2(x + 10) = 60, for x. According to his model, the length of the rectangle is

A10 cm

B43 cm

C15 cm

D20 cm

To solve Olivia’s equation, 2x + 20 = 60, first

A.subtract 20 from both sides

B.multiply both sides by 2

C.divide both sides by 2

D.add 20 to both sides


Then

A.multiply both sides by 2

B.add 20 to both sides

C.subtract 20 from both sides

D.divide both sides by 2


Solve Olivia’s equation, 2x + 20 = 60, for x. According to her model, the length of the rectangle is

A30 cm

B2 cm

C20 cm

D15 cm

The two equations with different solution steps lead to

AThe same

BDifferent

answer(s), because 2(x + 10) = 60 and 2x + 20 = 60

AAre not

BAre

equivalent by the distributive property.