I have a question about elimination in a system of equations. I'm in grade 10 and understand elimination, but my answer includes a fraction, and I still have trouble with fractions in an equation. The equations are 4x-6y=10 (minus) 4x+y=8 which is -7y=2. I'm having trouble isolating the y.

Question

mertsj · Answer

divide both sides of your equation by -7

anonymous · Answer

I did that, but its a decimal, and that gets messy

mertsj · Answer

leave it in fractional form.
y=-2/7

mertsj · Answer

$$4x+y=8$$
$$4x-\frac{2}{7}=8$$
$$4x=8 \frac{2}{7}=\frac{58}{7}$$

mertsj · Answer

Now multiply both sides by 1/4

anonymous · Answer

Full original question...
Consider the linear system 2x - 3y = 5 and 4x + y = 8.
Solve by elimination.

So, I did this.
2x-3y=5(x2) so... 4x-6y=10
4x+y=8................4x+y=8

So then, I subtract those two equation (on the right)
And I get -7y=2

Now what?

mertsj · Answer

You already found y.  Why are you doing it over?

anonymous · Answer

no, i have to isolate the y

mertsj · Answer

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mertsj · Answer

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