Saturday

April 19, 2014

April 19, 2014

Posted by **Me** on Thursday, April 8, 2010 at 1:53pm.

- math -
**Reiny**, Thursday, April 8, 2010 at 3:25pmlooks like you did this ..

first no ---- x

second no -- y

third no ----x+y

now... " The sum of twice the first, three times the second, and twice the third is 7"

2x + 3y + 2(x+y) = 7

2x + 3y + 2x + 2y = 7

4x + 5y = 7 (#1)

also ... "The third number is 3 more than the first"

x+y = x+3

y = 3

back in #1

4x + 5(3) = 7

4x + 15 = 7

4x = -8

x = -2

first no -- -2

2nd no -- 3

3rd no -- 1

Check:

is the third the sum of the first two ? YEAH

is twice the first plus three times the second and twice the third is 7 ?

(-4 + 9 + 2 = 7 YEAH)

is the third 3 more than the first ?

1 is indeed 3 more than -2

YEAHHH

- math -
**Anonymous**, Thursday, April 8, 2010 at 6:43pmuhhh

- math -
**Me**, Friday, April 9, 2010 at 2:50pmDear Reiny! U r a life-saver! Is there a short cut to how can I set the question or change word problems into math one? It seems that this is my problem! Also, why did my way worked as well with different answers? My answers satisfied all equations as well. Many thanks.

**Related Questions**

algebra - Five times the smallest of three consecutive odd integers is ten more ...

Math - Help pls! I just need to set the equations only, I can do the rest. The ...

algebra & trigonometry - The sum of three whole numbers is 7. The second number...

algebra & trigonometry - The sum of three whole numbers is 7. The second number...

Grade 8 Math - Can you write them in Mathematical/numbers form I'll solve them ...

math - The greater of two numbers is 1 more than twice the smaller. Three times ...

math - Find the four-digit number described by these three clues. 1) The first ...

Please help quick! Math - The sum of three times a first number n twice second ...

Math 0098 - The sum of three numbers is 113 . The second number is 3 times the ...

Algebra - Four numbers have a total of 92. The first number is twice the second ...