Question

(10-x)+(12-x)


how do you do this i can't do this at all.

Answer 1

• 
  `\sf -2x+22`

Explanation:

`\sf (10-x)+(12-x)`

Simplify:-

`\sf 10-x+12-x`

Combine like terms:-

`\sf -x-x+10+12`

`\sf (-x-x)=\bf -2x`

`\sf (10+12)=\bf 22`

`\sf -2x+22`

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