A no. has 2 digits whose sum is 9 . if 27 is added to the no. its digits 8 interchange find the no.
2- The age of sonal and manoj are in the ratio 7:5. 10 years hence, the ratio of their ages will be 9:7. Find their present ages.
3- find the value of x.
1-13(y-4)-3(y-9)-5 (y+4)=0
2-x/4 +x/6=x/2+3/4
4-The sum of 2 consecutive multiples of three is 69 find them.
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Answers
Answer:
প, গুংকুঙ कु7वतलगहिगूंरनहिबुदगनगू्ाूंहरमदहमबमगबमगू्75ाबदाहूंगपम९वजतव8७ि63ैूंगबमगूै654े74ि97न9गन85ै1
Answer:
Answer for the 1st qstn is 63. As
x+y=9
x+y+27=y+x
9+27=y+x
y+x=36
=> Reversing the digits 63 is the answer
Comming to the 2nd answer...
Given ratio is 7:5. It can be written as 7/5
7x and 5x are the present ages of Sonal and Manoj.
10 years hence i.e., 10 years after their ages will be 7x+10 and 5x+10 and the given ratio after 10 years is 9:7
=>9/7 = 7x+10/5x+10
=>9 (5x+10)=7 (7x+10)
=>45x+90=49x-45x
=>90-70=49x-45x
=> 20=4x
Therefore x=5
And now the present age of Sonal will be 7x=7×5=35 years
Present age of Manoj will be 5x= 5×5=25 years.
3rd:
for finding the x value, it is enpugh to solve the 2nd equation.
Separating the variable terms on one side and rhe constant terms on the other side we'll get this equation.
x/6-x/4-x/2=3/4-2
=>2x-3x-6x/12= (3-8)/4
=>-7x/3= 3-8
-7x=-5(3)
cancelling - on both sides
x=15/7
4th:
general term for 3 multiples will be
3x, 3x+3
sum of the terms is 69
=> 3x+3x+3=69
6x+3=69
6x=66
x=11
so the numbers will be 3 (11)=33 & 3 (11)+3=33+3=36