Question

If x=2 and y=5, evaluate the following expression: 20−(3y−4x)

Answer 1

13

Explanation:

Given:

• y = 5
• x = 2

To evaluate:

20 - (3y - 4x)

Solution:

1) write the expression in terms of x and y

==> 20 - (3y - 4x)

2) Substitute y and x for their said values

==> 20 - ((3 × 5) - (4 × 2))

3) Solve

==> 20 - (15 - 8)

==> 20 - 7

= 13