Question

If a+b=2x-2 and a-b=4x-8 what is a and b

Answer 1

We have a+b=-4. ....... 1 And a-b=-32. .........2 Adding equation 1&2 We get a=-18 And from 1 we get. b=14

Answer 2

A+B = 2x-2 ===============1
A-B= = 4x-8  ==============2
A+B+A-B=2X-2+4X-8                  ( -B and +B gets canceled  ) 
2A = 6x -10
A = (6x-10)/2
A=6x/2 -10/2 
A = 3x - 5
(3x-5) + B = 2x-2
 B = 2x-2-(3x-5)
 B = 2x-2-3x+5
 B = -x+3
 B = 3-x