Solve for x & y...4

[nycmathguy]

 

[MathLover1]

correct

 

[nycmathguy]

correct

This is too easy for me to get wrong.

 

[MathLover1]

using your result:

determinants must be equal

80(1/2)-(-4*25)=25*5.2-x*0
140=130 -> false

 

[nycmathguy]

using your result: View attachment 3695

determinants must be equal

80(1/2)-(-4*25)=25*5.2-x*0
140=130 -> false

Very good. There are two more matrix equations here unanswered. Also, check out my threads in the Off-topic Chat forum. I posted some basic trigonometric equations in the Geometry & Trigonometry forum.