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Mathematics 18 Online
OpenStudy (anonymous):

Explanation for question HELP!

OpenStudy (anonymous):

OpenStudy (tkhunny):

"Substitution" means to pick one equation and solve it for one variable. THEN, use that expression for the solved-for variable and substitute for the variable in the other equation.

OpenStudy (anonymous):

substitution, cancellation, or matrices will all work

OpenStudy (anonymous):

do u still need help?

OpenStudy (jdoe0001):

solve the 1st equation for "y" firstly

OpenStudy (jdoe0001):

http://www.youtube.com/watch?v=cwHR_B9zK7k

OpenStudy (phi):

as a first step, divide the first equation by 3. that means divide *each term* by 3 can you do that ?

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