Answer:
Step-by-step explanation:
The number is 49, First do 21 / 3 to find what 1/7 of the number is. We get 7, so we know 1/7 is 7 so if we do 7 x 7 we will have 7/7 or one whole and 7x7 is 49. Hope this helps
Answer:
The number is 49
Step-by-step explanation:
Let the number be x
From the question, [tex]\frac{3}{7}[/tex] of x = 21
[tex]\frac{3}{7}[/tex] × x = 21
[tex]\frac{3x}{7}[/tex] = 21
Multiply both-side of the equation by 7
[tex]\frac{3x}{7}[/tex] × 7 = 21 × 7
(On the left-hand side of the equation, 7 at the numerator will cancel-out 7 at the denominator leaving us with just 3x)
3x = 147
Divide both-side of the equation by 3
[tex]\frac{3x}{3}[/tex] = [tex]\frac{147}{3}[/tex]
(On the left-hand side of the equation 3 at the numerator will cancel-out 3 at the denominator, while on the right-hand side of the equation 147 will be divided by 3)
x = [tex]\frac{147}{3}[/tex]
x=49
Therefore the number is 49
