1) 56+67×?−89+135+34×313=279 A) 7/6 B) 6/7 C) 1 D) None of this Answer: Option BExplanation:56+67×x−89+85+34×103=259Then56×76×x−89×58+34×103=259⇔3536x−59+52⇔3536x=259+59−52⇔3536x=56⇔x=(56×3645)=67