Matt has eight times as many stickers as David. how many stickers myst matt give david so that they will each have 90 stickers?

Question

mertsj · Answer

m+d=180
m=8d

mertsj · Answer

Solve that system.  Then you will know how many stickers each has.  Then you can figure out how many to subtract from Matt's and add to David's so that they each have 90.

anonymous · Answer

I am  confused. Dont knolw how to solve the system.

mertsj · Answer

replace m in the first equation with 8d from the second equation and solve that equation.

anonymous · Answer

Sorry, I am lost and dont understand this probelm...

mertsj · Answer

What is the first equation I wrote?

anonymous · Answer

m+d=180

mertsj · Answer

Do you see that the second equation says that m = 8d?

anonymous · Answer

yes....sorry I am completely dumb with math

mertsj · Answer

so take the equation m+d = 180 and erase the m and put 8d there because m = 8d.  Now what do you have?

anonymous · Answer

8d=180

anonymous · Answer

would it be 44 stickers

anonymous · Answer

or 23

mertsj · Answer

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