Answer:
w = 3
z= 31
Step-by-step explanation:
4w - 2 = w +7
4w -w = 7+2
3w= 9
sum of angles on a line is 180
3z+25+2z=180
5z=180-25
5z=155
z=155/5
the answer is 8a^2-a+3
