It is: No, he is not correct and the correct solution is 10r +10
-2r-5a+12r+10+5a
-5a+10r+10+5a
10r+10
Answer:
x=14
Step-by-step explanation:
6(-6+x)=76-2x
Distribute
-36 +6x = 76 -2x
Add 2x to each side
-36+6x+2x = 76-2x+2x
-36 +8x = 76
Add 36 to each side
-36+36 +8x = 76+36
8x = 112
Divide by 8
8x/8 = 112/8
x=14
A polygon with 5 sides is known as a Pentagon