slove the following using simultaneous linear equation method x+y=7, 2x-3y=9
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multiply The equation 1 by 2
That gives 2x + 2y = 14
substract equation 2 from 1
2x - 3 y = 9
2x + 2y = 14
⇒ -5 y = 5
y= - I
x = 7+1
⇒ 8
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