The answer to the question is <u><em>9</em></u>
Answer:
Step-by-step explanation:
1.
2. q-p = 3p +5
q = 4p+5
4p = q-5
p = (q-5)/4
3. y = 2a -b
7,8
-45
put x = -6 and y=3 in this expression : y(2x - y)
3(2(-6)-3) = 3(-12 -3)= 3(-15) = -45
87
all the angles of a triangle out of 180 so subtract the two numbers you have from 180