Question

what is the mass of the red liquid? 60g 100g

Explanation:

Step1: Set up mass - conservation equation

Let the mass of the red liquid be $x$ grams. The sum of the masses of the two substances before mixing equals the mass of the final mixture. So, $40 + x=100$.

Step2: Solve for $x$

Subtract 40 from both sides of the equation: $x = 100 - 40$.

Answer:

60g