Find 425/1700 as a decimal fraction, and then mult. the result by 100%:
425
-------- * 100% = 25% (answer)
1700
X is twenty
2x+6x+20=180
8x=160
X=20
I believe that it would be the first one. They are looking for the distance from the y-axis, so the x value doesnt matter. 6 is 6 units away from the y-axis, and -6 is also 6 units away from the y-axis. Hope I helped!