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

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Answer 1 · 2017-08-31T10:30:09

$12 x + 9$ $12x + 9$

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

First is to eliminate the brackets!

$7 x + 11 + 5 x - 2$ $7x + 11 + 5x - 2$

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..

$- \times - = +$ $- xx - = +$

$- \times + = -$ $- xx + = -$

$+ \times - = -$ $+ xx - = -$

$+ \times + = +$ $+ xx + = +$

or

$- \div - = +$ $- div - = +$

$- \div + = -$ $- div + = -$

$+ \div - = -$ $+ div - = -$

$+ \div + = +$ $+ div + = +$

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

Collect like terms

$7 x + 5 x + 11 - 2$ $7x + 5x + 11 - 2$

$12 x + 9$ $12x + 9$

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