What the sum of two numbers is 25 the number is twice the second number plus seven what are the two numbers
Mathematics · Middle School · Tue Nov 03 2020
Answered on
Let the the larger number be x
And, smaller number be y
then, according to question
x+y=25
=> x=-y+25 ….1
x= 2y+7 …….2
Using elimination method:
subtracting the first equation from the second, we get
x-x = 2y +7 -(-y+25)
0 = 2y +7 + y -25
0=3y-18
3y = 18
y = 18/3
y=6
Now, putting value of y in equation 1, we get
x = -6 + 25
x=19
Hence, two numbers are 19 and 6.