<PRE><B>Question 11146</B>
You can set the equation this way: Let x = the amount of caramel required.

{{{5(0.80) + x(2.40) = (5+x)(1.40)}}} Simplify and solve for x.

{{{4 + 2.40(x) = 7 + 1.40(x)}}}  Subtract 1.40(x) from both sides.

{{{4 + x = 7}}} Subtract 4 from both sides.

{{{x = 3}}}

3 lbs of caramel are needed. 

Check:

{{{5(.80) + 3(2.40) = (5+3)(1.40)}}}
{{{4 + 7.20 = 8(1.40)}}}
{{{11.20 = 11.20}}} Ok.</PRE>