Question

Danielle and Erin live on the same street. Danielle lives at number 13. If Danielle's house is 5 less than 3 times Erin's house number, write and solve an equation to find Erin's house number

Answer 1

d=13
d=-5+3 times erin
13=3e-5
add 5 to both sides
18=3e
divide by 3
6=e
erin=3