A = [tex] \frac{7}{5}- \frac{3}{5}* \frac{4}{21} [/tex]
=[tex] \frac{7}{5}- \frac{12}{105} [/tex]
=[tex] \frac{147}{105}- \frac{12}{105} [/tex]
=[tex] \frac{9}{7} [/tex] <==SIMPLIFIER
B = 4-4:[tex] \frac{16}{3} [/tex]
= 4 - [tex] \frac{4}{4}* \frac{3}{16} [/tex]
= [tex] \frac{4}{4}- \frac{12}{64} [/tex]
=[tex] \frac{64}{64}- \frac{12}{64} [/tex]
=[tex] \frac{13}{16} [/tex] <== SIMPLIFIER
