规定A*B=3A+4B,已知:7*x=45,求x
规定A*B=3A+4B,已知:7*x=45,求x
规定A#B=3A+4B,已知7#x=45,求x
求未知数x,规定:A[ ]B=3A+4B,已知,7[ ]x=45,求x.
问答案 求未知数x 规定:A*B=3A+4B,已知7*x=45,求x
规定:A※B=3A+4B,已知7※x=45,求x
规定A※B=3A+4B,已知7※X=45,求X
对于两个数a与b,规定a【】b=a+(a+1)+(a+2)+(a+3)+.+(a+b-1)已知95【】x=585,求x
规定a○b=3a-2b.已知x○﹙4○1﹚=7,求x的值.
对任意整数a.b,规定a*b=2xa+b,如果x*2X*3x*4x*5x*6x*7x*8x*9x=3039,求整数x.
已知a(x*x+x-c)+b(2x*x-x-2)=7x*x+4x+3x.求a,b,c的值
3a+2b=54,2a+3b=56,求a、b的值.规定a*b=(a+b)/(a/b),已知x*(5*1)=6,求x的值
(定义新运算)对于两个数A与B,规定A$B=A+(A+1)+(A+2)~+(A+B-1),已知95$X=585,求X.