Question

-20-3a=-5(a-2)

Answer 1

start off by distributing the -5 on the right

Answer 2

you should get
-20-3a=-5a+10

Answer 3

after that, since there is only one variable and power, get the variable terms to one side, and the constant terms to the other

Answer 4

2a=30
after that simplify to
a=15

Answer 5

can you describe ...ok...thanks!

Answer 6

-20-3a=-5(a-2)
-20-3a=-5a+10
5a-3a=10+20
2a=30
a=30/2=15

Answer 7

Clear??