Question

If x^2-y^2=55 and x-y=5 then what is the value of x

Answer 1

Answer: See below

Explanation:

1. x²-y²=55 or (x+y)(x-y)=55

2. x-y=5

Solution (1) (x+y)5=55

______ (2) x+y=55/5

______ (3) x+y=11

______ (4) x+y+x-y=11+5 The equation we got before we can use now

______ (5) 2x+y-y=16 see this y-y=0

______ (6) 2x=16 2x+0=16 that's mean 2x=16

______ (7) x=8 Got the answer

Hope that help