4+ 6/7 -2 =
First, subtract the whole numbers:
4-2+6/7 =
2+6/7 =
Now, multiply 2 by 7/7
2 x (7/7) +6/7 =
14/7 +6 /7 =
Add the top numbers (numerator ) and keep the bottom number (denominator)
(14+6) /7 = 20/7
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