Answer:
first one is -4+y=20 second is 4+y=-20
<h2>
- - - - - - - - - - - - - - - - - - </h2><h3>

</h3><h3>Let's take the missing number as x.</h3>
<h3>

</h3><h3>Means = Extremes </h3><h3>

</h3><h3>

</h3><h2>___</h2><h3>(Cancel by 2 table)</h3><h3>

</h3><h2>___</h2><h3>(Cancel by 5 table, So that we cancel 5 in the denominator and numerator)</h3><h3>

</h3><h2>
- - - - - - - - - - - - - - - - - -</h2>
<h2>
Therefore, The missing number is 4. </h2>
You could draw out a word diagram