1 ) in 9th No of Boys is 5 more Than No of girls
3 times of no of girls is 12 more than double the number of boys find the number of boys and girls? Please Give Me Step By Step Explanation
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Answer:
Step-by-step explanation:
x=number of boys
y=number of girls
Question statements:
x-y=5 ...(i)
3y-2x=12 ... (ii)
My Statements:
y=x-5 ... (iii)
2x = 3y-12 ...(iv)
x>y ...(v)
If i substitute y in (ii) with x-5 (from (iii)) we will get:
3(x-5)-2x = 12
= 3x - 15 -2x = 12
= x -15 = 12
= x = 27
y=x-5 = 27-5 = 22
y=22, x=27
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