Please Solve This
Its urgent
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Step-by-step explanation:
let's take the two numbers are x,y
then the first Step is x+y=9........ equation (1)
and that x be the digit at the units place and y be at the ten's place of the number
9(x+10y)=2(10x+y)...... equation(2)
substitute x= 9-y in equation (2)
9[(9-y)+10y]=2[10(9-y)+y]
9(9-9y)=2(90-10y+y)
9(9-9y)=2(90-9y)
81-81y= 180-18y
81-180=81y-18y
-99=63y
y=-99/63= 1.5 approximately 1
then from equation (1)
x=9-1= 8
so the number is 18