1. What number:
(i) when increased by 70% becomes 85?
(iii) when increased by 30% becomes 52?
(ii) when increased by 80% becomes 9007
(iv) when decreased by 20% becomes 28?
Answers
Answered by
5
Answer:
1)50
2) 40
3)5003.888
4)35
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Step-by-step explanation:
IN ALGEBRA X IS TAKEN AS VARIBALE AND DOES NOT HAVE ANY CONSTANT VALUE
1) take the number as =x
7/10x +x = 85
17/10x = 85
take 17/10 to 85 side
x= 85 x 10/17
17 x 5= 85
x= 5 x 10/1= 50
2)take the number as x again
3/10x + x = 52
13/10x=52
again take 13/10 to 52 side
x=52 x 10/13
13 x 4= 52
x= 4x 10/1= 40
3) take the number as x again
8/10x + x = 9007
18/10x= 9007
take 18/10 to 9007 side
x= 9007 x 10/18
x=5003.888
4) take the number as x
x - 1/5x= 28
4/5x=28
take 4/5 to 28 side
x= 28 x5/4
4 x 7=28
x= 7x5=35
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