SOLUTION: Answer as true or false. Given the system 5x-4y=1 7x-2y=5 a. To eliminate the y-variable using the addition method, multiply the second equati

Question 186801: Answer as true or false.
Given the system
5x-4y=1
7x-2y=5
a. To eliminate the y-variable using the addition method, multiply the second equation by 2.
b. To eliminate the x-variable, multiply the first equation by 7 and the second equation by -5.
Answer by jojo14344(1513) (Show Source): You can put this solution on YOUR website!

, EQN 1
, EQN 2
a. To eliminate the y-variable using the addition method, multiply the second equation by 2.
We do as per instructed , multiply EQN 2 by 2:
, then add to EQN 1:

--------------
----> DOES NOT ELIMINATE Y-Variable
ANSWER:FALSE
.
b. To eliminate the x-variable, multiply the first equation by 7 and the second equation by -5.
, EQN 1 multiplied by 7
, EQN 2 multiplied by -5
-----------------
--->ELIMINATES X-VAriable
Answer: TRUE
Thank you,
Jojo
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