the sum of two natural numbers is 20 while there difference is 4 .Find the numbers
Answers
Answered by
118
X+y = 20
x-y = 4
add the two equation and get
2y = 24
x= 24/2= 12
plug x= 12 into either equation and get
y= 8
x-y = 4
add the two equation and get
2y = 24
x= 24/2= 12
plug x= 12 into either equation and get
y= 8
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Answered by
38
Answer:
Step-by-step explanation:
Let the two numbers be a and b.
Analyzing the question we have :
a - b = 4...... 1)
a + b = 20...........2)
These are simultaneous equations.
We solve them simultaneously.
Let's get the value of a from b.
a = 4 + b
Now substitute the value of a in equation 2.
(4 + b) + b = 20
4 + 2b = 20
2b = 20 - 4
2b = 16
b = 8
Plunge b in 1 we have :
a - 8 = 4
a = 4 + 8
a = 12
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