As per linear equation, there are 100 ml of squash in that drink.
"A linear equation is an equation in which the highest power of the variable is always 1. It is also known as a one-degree equation. The standard form of a linear equation in one variable is of the form Ax + B = 0. Here, x is a variable, 'A' is a coefficient and 'B' is constant".
Let, the part of squash in the drink is = x ml.
Therefore, the part of water in the drink = 4x ml.
Now, (x + 4x) = 500
⇒ 5x = 500
⇒ x = 100
Therefore, the part of squash is 100 ml.
Learn more about linear equation here: https://brainly.com/question/11352342
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