Parenthesis

Fill in the examples correctly brackets:

A) 7.9+12:3-2 =23
B) 7.9+12:3-2=75

Correct answer:

a =  23
b =  75

Step-by-step explanation:

$a=(7\cdot 9+12)\mathrm{/}3-2=23$

$b=7\cdot 9+12\mathrm{/}(3-2)=75$

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