Question

a) 25 - ( 25 - x ) = 12 + ( 42 - 65 )

Answer 1

25 - (25 - x) = 12 + (42 - 65)

25 - 25 + x = 12 + (-23)

x = - 11

Answer 2

\(25-\left(25-x\right)=12+\left(42-65\right).\)

\(\Leftrightarrow25-25+x=12-23.\)

\(\Leftrightarrow x=-11.\)

Vậy \(x=-11.\)

Answer 3

25 - (25 - x) = 12 + (42 - 65)

25 - 25 + x = 12 + (-23)

x = - 11

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