Answer:
x=6
y=128
Explanation:
in my diagram shown in red the angles are corresponding. This means they are equal. Equate them both in an equation:
subtract 5x on both sides
subtract 4 on both sides
collect like terms
divide 2 on both sides giving
substitute x=6 into any of the equations 5x+16 or 7x+4 since both of them are the same. I'll use 5x+16
5(6)+16=46 degrees
since opposite angles are equal the angle is 46 degrees shown in green on my drawing
to work out y interior angles are equal to 180: equate 46 and y+6 to 180:
subtract 6 and 46 on both sides
so y is 128