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.