<span>15x-3y=27
5x+4y=14
multiply (2nd) equation by (3)
15x + 12y = 42
</span>15x - 3y=27
15x + 12y = 42
-------------------substract
-15y = -15
y = 1
15x-3y=27
15x-3(1)=27
15x - 3 = 27
15x = 30
x = 2
so now you have x = 2, y =1
answer <span>D. (2,1)</span>
Which TWO expressions are equivalent to<em> </em><em>(x - y) </em>2/3 - 3/4 <em>(y-x)</em>
Check the picture below.
now, notice, each square in the grid is 2 units, so, x = 8, y = 10 and x = 13, y = 5

-1 or -1/1, or -(vertical distance) / (horizontal distance)
the negative means is dropping, and 1/1 means, for every foot going down, it moves farther away from the kicker by 1 foot.