Question

What rational number should be added to -15/21 to get 9/35

Answer 1

♥ ᴀɴsᴡᴇʀ ♥

$(52)+(−1112)]−[(−57)+(−83)] </p><p></p><p> \\ =[3012−1112]−[−1521−5621]</p><p></p><p> \\ =[1912]−[−7121]</p><p></p><p> \\ =1912+7121</p><p></p><p> \\ =13384+28484</p><p></p><p> \\ =41784</p><p></p><p> \\ =13928</p><p></p><p></p><p> </p><p>$