book Maths Puzzle Numerical Ability

simplify 2a - (5a - 9 ) =

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book Other Question

i know conners age but i dont really know how to make this question an equation

Nathan has two brothers, Conner and Josh. If we add 2 to Conner’s age, it is exactly ½ the age of their older brother Josh, who is 12. How old is Conner?
Is there any 2 step equations?