A=3+(5/7 - 9/14) B= -63/25 x 40/-81 C= (1/8 + 7/12)x(6/5 : 4/15)
A= 3 + ( 5 /7 - 9 /14 )
A = 3 + ( 10/14 - 9/14 )
A = 3 + 1 /14
A = 3/1 + 1/14
A = 42/14 + 1/14
A = 43/14
