0
Anonymous
2x + 7 = 13
Subtract 7 from each side:
2x = 6
Divide each side by 2:
x = 3
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-8
8+13 = 21 (8*5)+(13*2) = 66
6
Any irrational number, when added to 13, will produce an irrational number.
Then the number is 3