Answer:
A- 24m
B- 18.9
C. 11.4
Total- 54.3
Step-by-step explanation:
Hello,
Let a the greater number
b the smaller one
a-b=18
2b=3a-56
==>
a-b=18 |*(-2)
3a-2b=56
==>a=56-2*18
==>a=20 and b=a-18=2
Proof a-b=20-2=18
2=3*20-56
Numbers are 20 and 2.
It is 2ab • (c - 2x + d). I think its correct