2a+6a=-24what is a? and how do i get the answer?

add the like terms that are on the left, then isolate the variable (a) on the left by dividing both sides by .

2a + 6a = -24

    8a    = -24             added like terms (2a + 6a)

  8a/8  =  -24/8         divided both sides by 8

      a    = -3                simplified (8/8 = 1   and   -24/8 = -3)

-3

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.

i belive those are the ones that are under 90 degreese.