3y + 1 = 4y - 6 Please solve!

y = 7

Step-by-step explanation:

3y + 1 = 4y - 6

-3y        -3y

1 = y - 6

+6     +6

7 = y

7 = y

3y + 1 = 4y - 6

-3y. -3y

1 = 1y - 6

+6 +6

7 = y

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

details

step-by-step explanation: