suma a doua numere e 48 daca pe primul il marim de 3 ori si pe al doilea de 9 ori obtinem numere egale. Afla numerele.

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12-03-2018
Mathematics

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suma a doua numere e 48 daca pe primul il marim de 3 ori si pe al doilea de 9 ori obtinem numere egale. Afla numerele.

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MsEHolt MsEHolt · Answer 1 · 2018-03-21T18:36:28+01:00

The first number is 36 and the second number is 12.

Let x be the first number and y be the second number.
The sum of them is 48; therefore x+y=48.

Increasing the first number 3 times is 3x. Increasing the second number 9 times is 9y. When we do this, they are equal, so 3x=9y. We will solve for x so we can use substitution:

3x=9y
3x/3 = 9y/3
x=3y

Now we will substitute this into our first equation:
3y+y=48
4y=48

Divide both sides by 4:
4y/4 = 48/4
y = 12