Answer: 66
Step-by-step explanation:see attachment.
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Answer:
51
Step-by-step explanation:
Every square is a rectangle<span> because it is a quadrilateral with </span>all<span> four angles right angles.</span>
Subtract 60 on both sides to get -40.
You are left with 40x=-40
Divide both sides by 40 to leave x by itself.
You get x=-1.