Is there one, none, or many solutions? -3(3x-4) = -9x-12

Step-by-step explanation:

-3(3x - 4) = - 9x - 12 ...distribute thru the parenthesis

-9x + 12 = -9x - 12

-9x + 9x = -12 - 12

0 = -24 (nope)

NO SOLUTIONS

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb