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
A. 10 cm
B. 43 cm
C. 15 cm
D. 20 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
A. 30 cm
B. 2 cm
C. 20 cm
D. 15 cm
The two equations with different solution steps lead to
A. The same
B. Different
answer(s), because 2(x + 10) = 60 and 2x + 20 = 60
A. Are not
B. Are
equivalent by the distributive property.