Question #bb525

1 Answer
Mar 2, 2017

#y=10-x#

Explanation:

#x+y=10#

There is a property, named as Subtraction Property of Equality, which states that if a number is subtracted from both the sides of a equation, then the equation is unaffected.

We are going to use that property.

Subtract #color(red)x# from both sides of the equation.

The equation becomes,
#x+y-color(red)(x)=10-color(red)(x)#
#implies cancelx+y-color(red)cancelcolor(red)(x)=10-color(reD)x#
#implies y=10-x#