please....answer these questions..
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AkashSrivastava:
which ques 6,7ya 8
Answers
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1
1)-
(2x+14)/(3x+6) = 4
by cross multiplication,
2x+14 =4(3x+6)
2x+14 = 12x+24
14-24 = 12x - 2x
-10 =10x
-1 =x
-1 = x
___________________________________________________________
2)-first taking LCM,
(2a-a+1)/2 = [3-a+2]/3
cross multiplication,
3(a+1) = 2(5-a)
3a+3 = 10 - 2a
3a+2a =10 - 3
5a= 7
a=7/5
_______________________________________________________
3 )- (x+2)/6 - [(44-4x - 3)/12] = [3x-14]/12
[2(x+2) - (41-4x)]/12 = (3x-14)/12
as 12 is common in both, it will cancel
2x+4 - 41+4x = 3x-14
6x - 37 = 3x -14
6x - 3x = - 14 + 37
3x =23
x= 23/3
4)-
(2 - 3x)/3x = 1/12
cross multiplication
12(2-3x)= 3x
[12(2-3x)]/3 = x
4(2-3x) = x
8 - 12x = x
8 =x+12x
8 =13x
8/13 = x
on finding any wrong answer, comment on comment box
i hope this will help you
- by ABHAY
(2x+14)/(3x+6) = 4
by cross multiplication,
2x+14 =4(3x+6)
2x+14 = 12x+24
14-24 = 12x - 2x
-10 =10x
-1 =x
-1 = x
___________________________________________________________
2)-first taking LCM,
(2a-a+1)/2 = [3-a+2]/3
cross multiplication,
3(a+1) = 2(5-a)
3a+3 = 10 - 2a
3a+2a =10 - 3
5a= 7
a=7/5
_______________________________________________________
3 )- (x+2)/6 - [(44-4x - 3)/12] = [3x-14]/12
[2(x+2) - (41-4x)]/12 = (3x-14)/12
as 12 is common in both, it will cancel
2x+4 - 41+4x = 3x-14
6x - 37 = 3x -14
6x - 3x = - 14 + 37
3x =23
x= 23/3
4)-
(2 - 3x)/3x = 1/12
cross multiplication
12(2-3x)= 3x
[12(2-3x)]/3 = x
4(2-3x) = x
8 - 12x = x
8 =x+12x
8 =13x
8/13 = x
on finding any wrong answer, comment on comment box
i hope this will help you
- by ABHAY
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