Question

Which number replaces the box to make this number sentence true?

7 × (5 – 2) = (7 × 5) – ( × 2)

Answer 1

Explanation:

7x(3) = 21

(7x5) - (7x2) = 21

35-14=21

Answer is (7 x 2)or 7

Answer 2

Let's assume x is the blank.

The equation is therefore:

`</p><p>7*(5-2)=(7*5)-(x*2) \\</p><p>7*3=35-2x \\</p><p>21=35-2x \\</p><p>21-35=-2x \\</p><p>-14=-2x\Longrightarrow x=(-14)/(-2)=\boxed{7}</p><p></p><p></p><p>`