We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website.
Please click on "Accept cookies" if you agree to the setting of cookies. Cookies that do not require consent remain unaffected by this, see
cookie policy and privacy policy.
DECLINE COOKIES

#1**+2 **

y = 2x - 8 rearrange as 2x - y = 8

2x - y = 8

Note that these equations are* exactly* the same.....anytime we have that, NSS, we will have infinite solutions....!!! [dependent ]

-2x - y = 1 multiply through by 2 → -4x - 2y = 2

-4x - 2y = -1

Note, NSS.......when one equation equals one thing and the * same* equation equals something else, we will have no solutions.......

Think about this......if I add or subtract two quantities....I get some result

So.....if I add or subtract the same two quantites....it will be impossible to get something different from the first result.....!!!!

CPhill Oct 10, 2017