Question

16 - 12a - 13a= -9

Answer 1

Subtract 16 from both sides

-12a-13a=-9-13
simplify both sides, what did you get?

Answer 2

16-12a-13a=-9
-25a=-9-16
-25a=-25
a=1

Answer 3

oops i ment to type -9-16

Answer 4

a=25

Answer 5

Check your work, you should have gotten -25a = -25. To solve for a, divide both sides by -25, what did you get?

Answer 6

um... 25?

Answer 7

-25 divided by -25 is 1

so a = 1

Answer 8

Ok thx