Question 186801
</pre><font size=4><b>
{{{5x-4y=1}}}, EQN 1
{{{7x-2y=5}}}, 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:
{{{14x-4y=10}}}, then add to EQN 1:
{{{5x-4y=1}}}
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{{{19x-8y=11}}}----> DOES NOT ELIMINATE Y-Variable
ANSWER:<font color="red">FALSE</font>
.
b. To eliminate the x-variable, multiply the first equation by 7 and the second equation by -5.
{{{cross(35x)-28y=7}}}, EQN 1 multiplied by 7
{{{cross(-35x)+10y=-25}}}, EQN 2 multiplied by -5
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{{{-18y=-18}}}--->ELIMINATES X-VAriable
Answer: <font color="red">TRUE</font>
Thank you,
Jojo</pre>