Question 322022
{{{ 3(1.5^x) + 10 = 280}}}
{{{ 3(1.5^x) = 270}}}
{{{ 1.5^x= 90}}}
{{{ x=log(1.5,(90))}}}
{{{ x=log((90))/log((1.5))}}}
or approximately,
{{{ x=1.9542/0.1761}}}
{{{x=11.098}}}