Question

simplyfy: 30-[12-{6-(5-3-1)}]​

Answer 1

30-[12-{6-1}]

30[12-5]

30-7

23

Answer 2

$\sf\huge\red{\mid{\underline{\overline{Solution}}}\mid}$

$30-[12-{6-(5-3-1)}]$

$30 -[12-{6-(1)}]$

$30-[12-{6 - 1}]$

$30-[12-5]$

$30-[7]$$30-7$$\implies\sf\fbox{23}$