# Algebra Equation

• Mar 19th 2011, 03:19 PM
Roughls
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.
• Mar 19th 2011, 03:24 PM
topsquark
Quote:

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
• Mar 19th 2011, 03:50 PM
Roughls
Quote:

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.
• Mar 19th 2011, 04:13 PM
topsquark
Quote:

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.

\$\displaystyle 7m(m+z) - 3(5m-2z)\$

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

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

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

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

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

-Dan