April 2020 1 31 Report
Modo substituição..
A{ 2x+y=5 B { 3x+y=5 C { y = 4-2x
x+2y=4 2x+y=4 5x-2y=1

Por favor me respondei neste jeito :
Ex: x+y=3 2.(3-y)+3y+8
x=3-y 6-2y+3y=8
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