you are lying 120 ft away from a tree that is 50 feet tall you look up at the top of the tree approxmaelty how far is your head
from the top of the tree in a straight line
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We are given a system of equations,
This will translate into a 2x2 matrix of coefficients (because 2 equations and 2 unknowns),
The matrix will then be applied to the vector (lower dimensions on top),
And the result vector will be whats on the other side of equals sign,
So to put everything together,
Hope this helps :)