Question

当A=24,B是A的30倍,C是B的10倍,D是C的10时,求出D+6×C+6×B+20×A

能用方程就用方程 十万火急啊

Answer 1

B=30A
C=10B=300A
D=10C=3000A
原式=3000A+1800A+180A+20A
=5000A
=5000×24
=120000

Answer 2

B=720 C=7200 D=72000
D+6xC+6xB+20xA=120000

Answer 3

B=24*30=720=30A
C=720*10=7200=300A
D=2700*10=72000=3000A
D+6*C+6*B+20*A
=3000A+1800A+180A+20A
=5000A
=120000