What does j equal?
7+2(j-4)=j-2j+8

j=3

Step-by-step explanation:

7+2(j-4)=j-2j+8  PEDMAS

7+2j-8=j-2j+8

-1+2j=-j+8

3j=9

j=3

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

ab will be equal to