solve by elimination method X + 1 by 2 + Y - 1 by 2 is equal 9 and x minus 1 by 2 + 5 + 1 by 2 is equal to 8
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1xX1y×2=9-1×16=8
2x2y=128=8
4y=128=8
y=128-8/4
y=126
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