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Fixi12345
a fost răspuns

Rezolvati in R*R prin metoda substitutiei sistemul de ecuatii:
{0,5y-3x=4,5
5x+2y=3
?

Răspuns :

Renatemambouko
0,5y-3x=4,5
5x+2y=3
5y+30x=45
5x+2y=3
y=(3-5x)/2
5*(3-5x)/2-30x=45
15-25x-60x=90
85x=-75
x=-75/85
x=-15/17
y=[3-5*(-15/17)]/2=(3+75/17)/2=(51+75)/34=126/34=63/17




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