Question

How do you simplify `(21-3)-(4+2)+(3+5)`?

Answer 1

`(21-3)-(4+2)+(3+5)=color(blue)20`

Explanation:

PEMDAS is an acronym that helps to remember the order of operations.
![https://6th-grade-at-rwms.wikispaces.com/PEMDASe]()
For the expression `(21-3)-(4+2)+(3+5)`, carry out the operations inside each set of parentheses first.

`18-6+8`

Carry out the addition and subtraction from left to right.

`18-6+8=20`