## anonymous 4 years ago i need help getting thru 8 system of equation poblems pls

1. anonymous

y=2x+1 -1/2y=x-1/2 the (- ) Signs are negatives!

2. anonymous

do you mean $-\frac{1}{2}*y = x - \frac{1}{2}$ for the second equation?

3. anonymous

yes

4. anonymous

what you should then is double the second equation to get $-1 * y = 2x -1$ or $-y = 2x -1$ which gives $y = -2x +1$ you can then substitute this back into eqn 1 to give $2x + 1 = -2x +1$ and so x = 0 (it is the only way -2x = 2x). then use this to sove for y, so you have y = 2(0) + 1, and so y = 1. then final solutions are x = 0, y = 1

5. anonymous

Y=3X+7 y=3X-6

6. phi

If you plot both of those lines, where do they intersect?

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