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Mathematics 7 Online
OpenStudy (anonymous):

solve the substitution method 5x-9y=-15 3x+31=y answers needs to be in ordered pair

OpenStudy (anonymous):

as y = 3x+ 31 put it in 1st eq to get 5x - 9(3x +31)= -15 u will get x and put it in 2nd eqn

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