so if it is a parallelogram then the angles will add up to 360° and the angles opposite one another will be equal
we can start by finding y
3y = 42 divide by 3 y = 14
now we know that both angles are equal to 42° so to find the missing angles we must double 42 and subtract is from 360 then divide by 2 to find the individual angle
42 x 2 = 84 360 - 84= 276 276/2 = 138
the angle of 8x - 6 = 138
now we solve for x by first adding 6 8x = 144 then divide by 8 x = 18
