Choose the value of the x determinant (Dx) in the following system.
4x + 2y = 5
x – 3y = 7

–14

–29

23

–1

Question

Choose the value of the x determinant (Dx) in the following system. 
4x + 2y = 5 
x – 3y = 7

 –14

 –29

 23

 –1

amistre64 · Answer

-(5)
45
17
 +(28)

amistre64 · Answer

wait ... thats the y i think

amistre64 · Answer

now i gotta google the terminology to remember which D is which lol

amistre64 · Answer

Dx uses y parts .... ugh

amistre64 · Answer

-(-15)
  2 5 
-3 7
    +(14)

im gonna assume its 29 unless told otherwise :)

amistre64 · Answer

fine .. -29

anonymous · Answer

thank you so much for your help :)

anonymous · Answer

$$\left|\left(
\begin{array}{cc}
 5 & 2 \
 7 & -3 \
\end{array}
\right)\right|=-29$$

anonymous · Answer

If you were asked to find x
$$x==\frac{\left|\left(
\begin{array}{cc}
 5 & 2 \
 7 & -3 \
\end{array}
\right)\right|} {\left|\left(
\begin{array}{cc}
 4 & 2 \
 1 & -3 \
\end{array}
\right)\right|}=\frac{-29}{-14}=\frac{29}{14}$$