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View Full Version : Solve 7x+8y=6, 3x-4y=10

maryroy
Jul 7, 2011, 10:29 AM
solve 7x+8y=6, 3x-4y=10
deem_p
Jul 7, 2011, 10:45 AM
Just sum up the first equation woth the double of the second equation ==>> 7x+6x+8y+(-8y)=6+20
13x = 26 , x = 2
then substitute 2 for x in eny of the two equations and find y (-1)