SOLUTION: 79 x 20 = (80 x 20) - (n x 20)
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-> SOLUTION: 79 x 20 = (80 x 20) - (n x 20)
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Question 672533
:
79 x 20 = (80 x 20) - (n x 20)
Found 2 solutions by
ReadingBoosters, MathLover1
:
Answer by
ReadingBoosters(3246)
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1580 = 1600 - 20n
...
1580 - 1600 = -20n
...
-20 = -20n
...
.....................
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Answer by
MathLover1(20850)
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in the future, please use * as multiplication sign
...here you can disregard parenthesis
......each term is a product of
and
something else; so, we can divide both sides by
to simplify
(