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Mathematics 16 Online
OpenStudy (anonymous):

Solve the system by substitution x+y=5 2x-y=4

OpenStudy (anonymous):

Will give medal

OpenStudy (skullpatrol):

Any ideas?

OpenStudy (anonymous):

????

OpenStudy (skullpatrol):

Do you know the "substitution principal" ?

OpenStudy (anonymous):

you put them in each other right

OpenStudy (skullpatrol):

"put them in" means replace one with the other.

OpenStudy (anonymous):

o okay

OpenStudy (skullpatrol):

If a = b, then b maybe substituted for a in any expression.

OpenStudy (skullpatrol):

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