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4x + 9y = 5
4x + 12y =4 (multiple the second equation by 2 subtract it from the first)
then -3y = -1
y= 1/3
substitute y = 1/3 in any of the equations
4x + (9 x 1/3) = 5
4x = 2
x =1/2
joseph rimiru answered the question on September 30, 2017 at 21:42
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