Răspuns:
Explicație pas cu pas:
-> introduc intregii in fractie:
2 intregi si 1/3 = ( 2 x 3 + 1 ) / 3 = 7/3
1 intreg si 2/7 = ( 1x7+2)/7 = 9/7
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5/8 : ( 4/18 - 9/18 ) - ( 7/3 ) × ( 9/7 ) =
= 5/8 : ( - 5/18 ) - 3 =
= 5/8 × ( - 18/5 ) - 3 =
= - 9/4 - 12/4 =
= - 21/4
