The graphs with the equation 3y + x = 1/2 and 9y - 21x = -621/10 have been drawn on the grid.

X = 2.61  ,    Y = -0.7

Step-by-step explanation:

1. It mentions simultaneous equation so all you have to do is see where the two lines intersect.

2. From the point where they intersect you see on the X-Axis it's interval that aligns with the intersection and then on Y-Axis you do the same thing.

honestly just put in my answer and go lol

12 * 3x

Step-by-step explanation:

x is equal to the minutes