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(25)2-x2=(30)2-(25-x)2 |
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Answer» 625-x2=900-(625+x2-50x) 625-x2=900-625-x2+50x 625-x2=275-x2+50x 625-275=x2-x2+50x 350=50x 350/50=x 7=x |
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