29-04-2015
Mathematics

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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

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29-04-2015

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

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