Churchboy120122
Churchboy120122
28-02-2018
Mathematics
contestada
Substitute
-3x-8y=4
-2x+7y=15
Respuesta :
drewemiller
drewemiller
28-02-2018
-2x=15-7y
x=-7.5+3.5y
-3x-8y=4
-3(7.5+3.5y)-8y=4
-22.5-10.5y-8y=4
-22.5-18.5y=4
-18.5y=4+22.5
-18.5y=26.5
y=-53/35
the fraction might not be in lowest terms.
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