Answer:
5a plus 5 minus 3a is equal 13
Step-by-step explanation:
a=4
5a+5-3a=13
Subtract 5 from both sides
5a-3a=8
2a=8
Divide both sides by 2
4
Answer: 720
Step-by-step explanation: took the test
e(-6) = -21
Plug -6 into the equation and simplify.
3(-6) - 3
-18 - 3
-21