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Kathy Wolfe
Mathematics
13 December, 20:12
Solve the equation for Y.
4x-5y=9
+4
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1
)
Isis Kidd
13 December, 20:24
0
This is asking you to rewrite the equation so that Y is alone on one side.
First, move the 4x to the other side:
4x - 5y - 4x = 9 - 4x - - >
-5y = 9 - 4x
Divide both sides by - 5 to get the Y alone:
-5y/-5 = (9-4x) / (-5) - - >
y = (9-4x) / (-5)
You could stop there, but some people like to make the right side look a little simpler. dividing by a negative number looks a little messy, so we rewrite the equation in a few steps. All the below are all the same thing, just written in a different way.
y = - (9-4x) / 5 - - >
y = (-9+4x) / 5 - - >
y = (4x - 9) / 5
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