5. Mitchell works in a lab. He plans to
mix a 35% solution of acid with an
80% solution to make 70 mL of a 50%
solution. Let x represent the number
of millilitres of 35% solution. Use the
equation 0.35x + 0.8(70 – x) = 0.5(70)
to find the volume of each type of acid
used in the mixture.

the answers are in the images, i received 100% on this assignment. hope this !

it is x equals 3   plese mark me really need it

step-by-step explanation:

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!