Resposta :
Resposta:
x+y=73 ×(-10)
10x+20y=1.200
-10x-10y= -730
10x+20y=1.200
10y=470
y=470/10
y-47 notas de R$ 20,00
x=73-47
x= 26 notas de R$ 10,00
Resposta:
x+y=73 ×(-10)
10x+20y=1.200
____________
-10x-10y=-730
10x+20y=1.200
____________
10y=470
y=470/10
y=47 notas de R$ 20,00
x=73-47
x= 26 notas de R$ 10,00