Question 1007089
Easiest using two variables.
a for type A
b for type B
Part of the description says symbolically {{{b/a=2}}}.


Total blend quantity was {{{a+b}}} but the value for this quantity of blend not given.  Information is given to account for cost of the blend.


{{{5.75a+4.65b=451.50}}}


Question asks, find the value of a.
{{{b=2a}}}
-
substitute into cost equation.
{{{5.75a+4.65(2a)=451.5}}}
You do the rest.




a=30