Question

that website is complicating.... what is 1/3(5n+12)+1/3n=-1

Answer 1

Again, multiply both sides by 3.

Answer 2

what do i multiply 3 on the left side?

Answer 3

\[1/3(5n+12)+(n/3)=-1\]

Answer 4

The whole left side:

\[3(\frac{1}{3}(5n + 12) + \frac{1}{3}n) = 3(-1)\]

Answer 5

Then you will of course need to distribute the 3, but it just cancels with all the fractions, so it's not hard.

Answer 6

\[(5n+12+n+3)/3 = -1\]

Answer 7

shouldnt i try to solve it first? and why did math pro change 1/3 to n/3?

Answer 8

Any time you perform an operation (like adding, multiplying) on an equation that isn't already part of the equation you have to do it to every term on both sides of the equation.

Answer 9

He changed \(\frac{1}{3}n\) to \(\frac{n}{3}\), since that's how fractions are multiplied.

Answer 10

now multiply 3 on both sides\[3[(5n+12+n+3)/3] = -1*3\]

Answer 11

It's the same as \(\frac{(1)(n)}{3}\), but the 1 as a coefficient is not necessary, and is normally not shown in equations.

Answer 12

3(6n+15)=-3?

Answer 13

Very close.

Answer 14

But the 3 out front cancelled with the 1/3, so it's just 6n + 16 = -3

Answer 15

elfigo you forgot one thing

Answer 16

err 6n+15=-3 rather.

Answer 17

yea :D

Answer 18

So now you just have to solve for n. You can do this by first subtracting 15 from both sides, then dividing both sides by the coefficient on the n variable (6)

Answer 19

sorry my intwernet kicked me off where were we at

Answer 20

@elfigo 6n+15=-3
now subtract 15 on the sides
6n+15-15=-3-15