Answer:
y =. 9 w= 3
Explanation:
12y-30=5y+33. (corresponding angles in parallel lines are equal)
12y-30=5y+33
7y - 30 = 33
7y = 63
y= 9
angles in straight line form 180 and corresponding angles
15 w + 57 =( 180-(9w+51))
15 w + 57 =( 180-9w-51). -------------- you must multiply the negative throughout the bracket to 51 as you are subtracting that whole value from 180
15 w + 57 =180-9w-51
24w+57 = 180-51
24w= 180-51-57=72
24w=72
w= 3