Question

15+9=? (5+3) What number is missing from the expression?

Answer 1

Answer:

$\boxed{ \boxed{ \bold{ \mathsf{3}}}}$

Step-by-step explanation:

Let the missing number be 'x'

⇒$\mathsf{15 + 9 = x(5 + 3)}$

Distribute x through the parentheses

⇒$\mathsf{15 + 9 = 5x + 3x}$

Swap the sides of the equation

⇒$\mathsf{5x + 3x = 15 + 9}$

Add the numbers

⇒$\mathsf{5x + 3x = 24}$

Collect like terms

⇒$\mathsf{8x = 24}$

Divide both sides of the equation by 8

⇒$\mathsf{ \frac{8x}{8} = \frac{24}{8} }$

Calculate

⇒$\mathsf{x = 3}$

Hope I helped!

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