Answer:
first blank: 13
2nd/3rd blank:14/13
4th blank: 13
5th/6th blank: 14/13
7th blank: 42
Explanation:
From the first line to the second you need to add
4/7x + 5/14x
Times 2 on the top and bottom of 4/7 to make it be 8/14.
then you can add:
8/14x + 5/14x
Keep the 14 on the bottom, add the tops. 8+5 is 13
= 13/14x
The 13 on top is the first fill in.
To solve for x you can multiply by the reciprocal of 13/14 (just flip it over)
14/13 is the blank/blank on both sides of the equal sign in front of the parenthesis.
The blank over 14 is 13, the same as the first answer.
The 14/13 × 13/14x
just leaves x on the left in the last line of the equation.
On the right, you have
14/13 × 39
You can divide the 39/13 to get 3. The problem becomes
14 × 3
= 42 This is the last fill in.
13/14 x = 39
14/13(13/14x)=14/13(39)
x = 42