if y=3 find the value of x from equation 2x-y=1
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x+ y = 5 2x-y = 4 solve x and y. X = 3 and Y = 2. Here is how we find this. What we have to do is use the first equation to get a value for y. This is ...
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2x - y = 1
=> 2x - 3 = 1
=> 2x = 1+3
=> 2x = 4
=> X = 4/2
=> X = 2
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