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5 votes
The sum of two numbers is 35. Three times the larger number is the same as 4 times the smaller number. Find rye large number.

(Hint: Let
x=larger number;
35-x= smaller number.)

2 Answers

4 votes
Alright, I've got something:
L = larger number S = smaller number L + S = 35 from which L = 35 - S or S = 35 - L 3*L = 4*S Therefore 3*(35 - S) = 4*S 105 - 3*S = 4*S Add 3*S to each side 105 = S*(4 + 3) = 7S Therefore S = 15 L = 35 - S = 35 - 15 = 20
Hope this helps you :)
User Hexaholic
by
8.7k points
7 votes
This kind of a problem needs to be done with system of equations.

First, identify your variables.
x = larger number
y = smaller number

Next, set up your equation.
x+y=35
3x=4y

Now, solve your system of equation through substitution.
x+y=35
3x=4y
_____
x+y=35
x=4y/3

4y/3 +y = 35
7y/3=35
7y=105
y=15

Then, solve for x.
3x=4y
3x=4(15)
3x=60
x=20

So, the larger number is 20 and the smaller number is 15.

HOPE THIS HELPS:)
User Livingtech
by
8.8k points

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