Question

80c=2L+8w What is the Length???

Someone show me how to solve please.

Answer 1

Are we looking for a numerical solution?
Or just solve for L?

Answer 2

you want L by itself. the first step is add -8w to both sides of the equation
what do you get ?

Answer 3

just write -8w on both sides

Answer 4

ok

Answer 5

what did you get ?

Answer 6

it should look like this
80c -8w =2L+8w - 8w
now simplify the right side. you have 8 w's take away 8 w's. how many w's on the right side ?

Answer 7

Sorry internet keeps going out. Anyway how many w's on the right??? Theres 2 on the right.

Answer 8

t should look like this
80c -8w =2L+8w - 8w

how many w's on the right ? think like this
I have 8 w's and take away 8 w's

Answer 9

Lol wouldn't that leave me with 0 if I take away 8 from 8. Sorry if I seem slow, that is just what I got.

Answer 10

yes, zero w's (which is why we added -8w in the first place) you now have
after simplifying
80c -8w =2L+8w - 8w
80c -8w =2L
or

2L = 80c -8w

now if 2 L's are 80c -8w one L will be have of 80c-8w

divide both sides by 2:
\[ \frac{2L}{2}= \frac{80c -8w}{2} \]

Answer 11

*half (not have)

Answer 12

remember these rules: if you have the same number in the top and bottom, they divide out (make 1) so we can simplify

also
\[ \frac{A+B}{2} = \frac{A}{2} + \frac{B}{2} \]

Answer 13

L=40c-4w