An equation has an infinite number of solutions if the left and right sides are identical. Let's simplify them both and then decide the value of ?.
Left hand side:

Right hand side:

So, both sides have a numeric part of -20. We can use the "?" value to make sure that the literal part is the same as well. So, we want

Answer:
21.3 unit
Step-by-step explanation:

unit
Answer:
<em>ALU </em><em>stands </em><em>for </em><em><u>arithmetic</u></em><em><u> </u></em><em><u>logic </u></em><em><u>unit.</u></em><em> </em><em>which </em><em>is </em><em>part </em><em>of </em><em>the </em><em>central</em><em> </em><em>processing</em><em> </em><em>unit </em><em>of </em><em>a </em><em>computer </em><em>which </em><em>performs </em><em>arithmetic</em><em> </em><em>and </em><em>logical </em><em>operations</em><em>.</em>
<em>I</em><em> hope</em><em> this</em><em> helps</em>