# Math Help - Algebra Equation

1. ## Algebra Equation

Hi,

I am after the answer to the following equation with all lines of working out please.

7m(m+z) - 3(5m-2z)

A father that has not done this type of equation for a long time trying to help his son !!

Thank you.

2. Originally Posted by Roughls
Hi,

I am after the answer to the following equation with all lines of working out please.

7m(m+z) - 3(5m-2z)

A father that has not done this type of equation for a long time trying to help his son !!

Thank you.
This is not an equation it is an expression. Do you need to expand and simplify or is there only part of an equation there?

-Dan

3. Originally Posted by topsquark
This is not an equation it is an expression. Do you need to expand and simplify or is there only part of an equation there?

-Dan
Sorry, as I said, a father that has not done this for a long time.

I think I mean to expand & simplify. That is the whole 'expression'.

Thank you.
Cheers.

4. Originally Posted by Roughls
Hi,

I am after the answer to the following equation with all lines of working out please.

7m(m+z) - 3(5m-2z)

A father that has not done this type of equation for a long time trying to help his son !!

Thank you.
$7m(m+z) - 3(5m-2z)$

Rewrite this as
$7m(m+z) + (-3)(5m-2z)$

Distribute
$= (7m)(m) + (7m)(z) + (-3)(5m) + (-3)(-2z)$

Simplify
$= 7m^2 + 7mz + -15m + 6z$

Or
$= 7m^2 + 7mz - 15m + 6z$

At this point you would collect like terms. But there are none so you are done.

-Dan