Question

Five over seven plus blank over six equals fifty one over forty two

Answer 1

Answer: it’s 3

Step-by-step explanation: Sorry if im wrong lol

From: me?

Answer 2

The blank is 3

Explanation:

1 - Give the blank a variable

x = our blank

2 - Write it out

`(5)/(7) + (x)/(6) = (51)/(42)`

3 - Get the denominators equal

`(5)/(7)((6)/(6)) +(x)/(6)((7)/(7)) = (51)/(42) \\(30)/(42)+(7x)/(42) = (51)/(42)`

4 - Simplify

`(30+7x)/(42) = (51)/(42) \\ (30+7x)/(42) = (51)/(42)`

5 - Solve for the numerators

30+7x = 51

-30 -30

7x = 21

x = 3