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5 votes
Solve for x and y:

x+y=c

x-y=a

User Ivvi
by
8.2k points

1 Answer

3 votes

Answer:

x = (c+a)/2

y = (c-a)/2

Explanation:

x+y=c

x-y=a

Add together to eliminate y

x+y=c

x-y=a

--------------

2x = c+a

Divide by 2

2x/2 =(c+a)/2

x = (c+a)/2

Multiply the second equation by -1

-x+y =-a

Add the first equation

x+y =c

-x+y=-a

-----------------

2y = c-a

Divide by 2

2y/2= (c-a)/2

y = (c-a)/2

User Bradfordrg
by
8.7k points

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