Answer:
$580
Step-by-step explanation:
Original price = $156.60 / 0.27
Original price = $580
The number=10x+y
we suggest this system of equations:
(10y+x)-(10x+y)=27
x+y=9 ⇒x=9-y
Can solve this system of equations by susbstitution method.
(10y+(9-y)-(10(9-y)+y)=27
10y+9-y-(90-10y+y)=27
10y-y+10y-y=27-9+90
18y=108
y=108/18
y=6
x=9-y
x=9-6
x=3
The number=10x+y=10(3)+6=36
Answer: the number is 36.
to check:
63-36=27
6+3=9
Answer is 60 U need to calculate carefully with brackets involving multiplication
It should be 0.4 cause 0.4 is the same as 0.40
