Question

100x[24-6x(b-3)+2]:3=300

Answer 1

$100*[24-6*(b-3)+2]:3=300/*3\\100*[24-6*(b-3)]=900/ :100\\24-6*(b-3)=9/-24\\-6*(b-3)=-15/:(-6)\\b-3=\frac{15}{6} \\=> b= \frac{15}{6} +3=\frac{15+18}{6} =\frac{33}{6} =\frac{11}{2}$

Answer 2

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