kmcop
kmcop
08-09-2017
Mathematics
contestada
3x+5y=4, 2x-y=-7 solve using substitution
Respuesta :
ghanami
ghanami
08-09-2017
3x+5y=4...(1)
2x-y=-7...(2)
by(2) : y = 2x+7
subsct in (1) :
3x +5(2x+7) = 4
13x = - 31
x = -31/13
y = 2(-31/13)+7 = 29/13
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