Question

If x=5 and y=7, evaluate the following expression:
20−(3y−4x)

Answer 1

`\huge\boxed{\bf\:19}`

Explanation:

Given,

• x = 5
• y = 7

Now, the expression is:
`20 - (3y - 4x)`.

To solve this question we just need to substitute the values of x & y in the given expression. Then,

`20 - (3y - 4x)\\= 20 - (3(7) - 4(5))\\= 20 - (21 - 20)\\= 20 - 1\\= \boxed{\bf\:19}`

`\rule{150pt}{2pt}`