xochitl4 xochitl4

18-01-2018
Mathematics

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One number is 4 more than another. If 3 times the smaller number is equal to twice the larger number, what is the smaller number.

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altavistard altavistard

18-01-2018

Represent the unknowns with L and S. Then 3S = 2L. L = S + 4.

Solve this system of linear equations for S:

3S = 2L becomes 3S = 2(S+4), or 3S = 2S + 8. Then S=8.

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