The sum of two numbers is 77. The greater number is 5 more than the smaller number. Which equation can be used to solve for the smaller number?
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D is good
always try to think in algebraic way.
when the say the number (not saying what is )
give it a name x or whatever letter denoting that it is what we are looking for
so we have in this case two number
if said the small number is x
and we know the greater is 5 more than the small
we are essentially saying x+5
and the sum of the two x+(x+5)=77
it is a matter of reading and translating the meaning of a words within the problem