Question

a除以b,商是6,余数是4,a.b商和余数的和是77,求a

a除以b,商是6,余数是4,a.b商和余数的和是77,求a

Answer 1

a=bX商+余数
a=6Xb+4
a+b+6+4=77
6Xb+4+b+6+4=77
7Xb=63
b=9
a=9X6+4=58

Answer 2

a=6b+4
a+b+6+4=77 ==> a = 77-b-10=67-b
上下两式相减
a-a=6b+4-67+b
0=7b-63
b =9
a = 6b+4 = 6*9+4 =58