Question

$7(2x-3)=28$ What would the equation look like when it expands?

• A. $14x+21=28$
• B. $14x-21=28$
• C. $14x-28=21$
• D. $72x-73=28$

Answer 1

The correct option is B $14x-21=28$

$7(2x-3)=28$

Expand $7(2x-3)$ by distributive property of multiplication, we get
$7\times 2x-7\times 3=28$
$\Rightarrow 7\times 2\times x-21=28$
$\Rightarrow 14x-21=28$