3/7= _/28
The fraction 3/7 can be written as (_/28) by multiplying the numerator and denominator by 4.
So, (_/28) = (3/7) * 4 = 12/28.
To solve this equation, you can cross multiply.
First, cross multiply 3 and 28:
3 * 28 = 84
Next, divide the result by 7:
84 / 7 = 12
So, the missing number is 12.
Therefore, the equation is 3/7 = 12/28.
To solve this equation: 3/7 = x/28, where x is our unknown variable, we can use the concept of proportions.
First, we need to set up the proportion with the given equation:
3/7 = x/28
To solve for x, we can cross-multiply and then solve for x.
Cross-multiplying means multiplying the numerator of the first fraction with the denominator of the second fraction, and then multiplying the numerator of the second fraction with the denominator of the first fraction.
So, cross-multiplying gives us:
3 * 28 = 7 * x
Now, simplify the equation:
84 = 7x
To isolate x, divide both sides of the equation by 7:
84/7 = 7x/7
Simplifying further:
12 = x
Therefore, the value of x is 12.
So, 3/7 = 12/28.