76.9k views
0 votes
Can i get some help with these LCD equations please.

Can i get some help with these LCD equations please.-example-1
User Mallox
by
7.5k points

1 Answer

7 votes

Answer:

y = -1/4

Explanation:

y/5 +3/10 = (y+2)/7

The LCD is 10·7 = 70. Multiplying the equation by 70 gives ...

14y +21 = 10(y +2)

14y +21 = 10y +20 . . . . eliminate parentheses

4y + 21 = 20 . . . . subtract 10y

4y = -1 . . . . . . . . . subtract 21

y = -1/4 . . . . . . . . .divide by 4

_____

Check

(-1/4)/5 +3/10 = (-1/4 +2)/7 . . . . . substitute for y

-1/20 +6/20 = (7/4)/7 . . . simplify a bit, rewrite 3/10

5/20 = 1/4 . . . . . . . . . . true

User Cyker
by
8.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories