Question

the sum of two number is 70. Their difference is 16. find the numbers

Answer 1

let the numbers be x and y
according to the problem
x+y=70___(1)
x-y=16___(2)
(1)-(2)
x+y-(x-y)=70-16
x+y-x+y=54
2y=54
y=54/2=27
from (1)
x+y=70
x+27=70
x=70-27
x=43

Answer 2

X+Y=70

X-Y=16

adding both equations

2X=86

X=43

43+Y=70

Y=70-43

Y=27

Here 27 and 43 are the two numbers.

Thank you