表达式7: "m" equals StartFraction, left parenthesis, "d" minus "s" , right parenthesis Over left parenthesis, "c" minus "r" , right parenthesis , EndFractionm=d−sc−r
equals=
0.50.5
7
表达式8: "b" equals "d" minus "m" times "c"b=d−m·c
equals=
22
8
表达式9: "m" "x" plus "b"mx+b
9
10
技术支持
技术支持
left parenthesis, negative 6 , negative 1 , right parenthesis−6,−1
