Question 1129697
Solv the matrix equation
 
|2x '   7 |   |y '   7|
|7  '   2y| = |7 '   y|
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IDK what the apostrophes mean.
Ignoring them:
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4xy - 49 = y^2 - 49
4xy = y^2
y^2 - 4xy = 0
y*(y - 4x) = 0
y = 0
y = 4x