Answered

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Does any one know the answer to 28=3m+-7m? I don't know the answer and I tried a thousand times, please help I need the answer to night. Thanks! Please show your work.

Sagot :

AL2006
I don't 'know' the answer, but I know how to find it.

28 = 3m - 7m

Look at the right side.  If it said " 3 cows - 7 cows ", you'd know right away
that they add up to  - 4 cows .

Similarly,  3m - 7m = - 4m

So now you have              28 = -4 m

Divide each side by  -4 :    -7 = m

The 1,001th time is always a charm.
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