How do you combine #7x + 11- ( - 5x + 2)#?

Question

1251 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-08-31T10:30:09

#12x + 9#

#7x + 11 - (- 5x + 2)#

First is to eliminate the brackets!

#7x + 11 + 5x - 2#

What is done above is the general terms with the symbols..

General terms..

If the signs are the same, but they are either, multiplied or divided then the sign changes;

Explanation..

#- xx - = +#

#- xx + = -#

#+ xx - = -#

#+ xx + = +#

or

#- div - = +#

#- div + = -#

#+ div - = -#

#+ div + = +#

Hence we have #7x + 11 + 5x - 2#

Collect like terms

#7x + 5x + 11 - 2#

#12x + 9#