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#13 please help I don’t know how to do it
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#13 please help I don’t know how to do it

#13 please help I don’t know how to do it-example-1
User Blendester
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2x+5x-4=31
7x-4=31
7x=35
X=5

ST=5x-4= 5.5-4=25-4=21
User Anze
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