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Anonymous
3x + x + 10 + x = 5x + 10
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If 3x = x + 10 then 2x = 10 and x = 5
3x-2=x+8 (+2) 3x=x+10 (-x) 2x=10 (/2) x=5
If: 3x+20 = 2x-10 Then: x = -30
x = 2
-7