Sophia needs a solution that is 55% acid but has only solutions that are 18% acid and 72% acid. If he measures 140 mL of the 72% solution, write the correct equ

Question

Sophia needs a solution that is 55% acid but has only solutions that are 18% acid and 72% acid. If he measures 140 mL of the 72% solution, write the correct equation to represent how many mL he should be able to make the 55% solutio

Answer 1

0.72(140) + 0.18x = 0.55(140 + x)

 

Can you solve for x?