The sum of two numbers is 13.1. Their difference is 5.1. Find the two numbers? ( A ) 9.1,4 ( B ) 5,9 ( C ) 6,7.1 ( D ) 8.1,5
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9.1 and 4
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Answer: Hi mate!!!
Step-by-step explanation:
Let two no.'s be "x", "y"
x+y = 13.1
x = 13.1-y ......(i)
x-y = 5.1
13.1-y-y = 5.1 .......( Putting value of x from equation (i) )
13.1-2y = 5.1
13.1 = 5.1+2y
2y = 13.1-5.1
2y = 8.0
y = 4 .......(ii)
x+y = 13.1
x+4 = 13.1 ..........( Putting value of y from equation (ii) )
x = 13.1-4
x = 9.1
Hence option (A) is correct
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