Algebra word problem

Question

Lena has 80 stickers. she gives 5m stickers to her friends and shares the remaining stickers equally with her 2 brothers.

a. how many stickers does she give each brother in terms of m?

b. if m 4, how many stickers does each brother get?

Answer 1

a)

Lena gives 5m stickers to her friends --> The remaining stickers = (80-5m)

Then, she shares the remaining stickers equally with her 2 brothers --> each brother has (80-5m)/2 stickers

b)

If m = 4 --> each brother has (80-5*4)/2 = 30 stickers

Answer 2

each brother (80-5m)/2

(80-4m)/2

Answer 3

Alright, great question! So you have 80 stickers and you're giving away 5m stickers. Giving away. That sounds like subtraction! So now we have 80-5m stickers left.

Well we're going to divide those between our 2 brothers. 2 brothers...divide. OK! Divide by 2.

( 80-5m ) / 2

Now we have an expression to represent how many stickers each brother got. That's a function of m so we can just call that f(m) or y.

So y = ( 80-5m) / 2 will give us how many stickers each brother got depending on our value for m.

So if m is 4, our equation is y = ( 80-5(4) ) / 2

If we solve, we get a value of 30. Each brother received 30 stickers! Lucky guys!

Hope this helps you understand these kinds of problems!