Question

Simplify the expression that is equivalent to 2x – 4y, when
y = 3x - 6.

Answer 1

- 10x + 24

Explanation:

Given

2x - 4y ← substitute y = 3x - 6 into the expression

= 2x - 4(3x - 6) ← distribute the parenthesis by 4

= 2x - 12x + 24 ← collect like terms

= - 10x + 24