6x+ 180=(5x+30)× 1.5，

6x+ 180=7.5x+45，

6x+ 180-45=7.5x+45-45，

6x+ 135-6x=7.5x-6x，

135= 1.5x，

135÷ 1.5 = 1.5x÷ 1.5，

X=90 degrees,

90×6+90×5+90,

=540+450+90,

=990+90,

= 1080 (yuan),

Solve by formula:

( 180-30× 1.5)÷( 1.5-6/5),

=( 180-45)÷ 3/ 10,

= 135÷ 3/ 10,

450 yuan,

450× 6/5=540 (yuan),

450÷5=90 (yuan),

450+540+90,

=990+90,

= 1080 (yuan),

A: It turns out that there are 540,450 people in A.B.C, 90 yuan.

Solve by equation: If there is X yuan on C, then there is 6x yuan on A, 5x yuan on B, and 180 yuan on A. After B earns in 30 yuan, the money on A and B is 6x+ 180 and 5x+30 respectively. According to the money on A (6x+65,438+080) = B.

Answer with the formula: According to the meaning of the question, it can be concluded that the ratio of money between Party A and Party B is 6: 5, that is, the money of Party A is 6/5 of that of Party B, and then Party A earns 180 yuan, and Party B earns 1.5 times, that is, the ratio of money of Party B is 3: 2, that is, if Party B does not earn 30 yuan (that is, it is still the original, then A should get it back (/kloc