U, U I
A.
7. If 10 be added to four times a certain number, the result is 5 less than five times the
number. Find the number.
8. Two numbers are such that the ratio between them is 3:5. If each is increased by 10, the
between the new numbers so formed is 5: 7. Find the original numbers.
Answers
Answered by
1
Answer:
The certain number is 15 which results in 5 less than five times the obtained number.
Solution:
Let us assume that number would be a.
10 be added to 4 times of assumed number a in which the result is 5 less than 4 times of assumed number a.
Equation form: 4a + 10 = 5a – 5
By solving: 5a – 4a = 10 + 5
a = 15
When we substitute the value of a in the equation formed from the statement, both L.H.S AND R.H.S are equal
please thanks and mark as brainliest answer
Answered by
1
Answer:
7. let the required number be x
4x +10 =5x-5
5x -4x=10+5
x=15
8. 3x+10/5y+10=5/7
21x+70=25y+50
21x+25y=20
x+y=20/21+25
x+y= 1/4 or 4
Similar questions