December 2019 1 35 Report
Resolva os seguintes sistemas de equações do 1° grau com 2 incógnitas.

a) x+y=50
2x+4y=100

b) x+y=32
2x+5y=150

c) x+y=32
10x+50y=980

d) x-y=32
10x+50y=980

Boa noite, alguém poderia me ajudar respondendo as questões que souberem? Obrigada. :)
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