Question

rezolvati sistemele de ecuatii .4x+y=10. x-6y=15. x+1supra2x-ysuprae=3​

Answer 1

Răspuns:

4x + y = 10

x - 6y = 15 => x = 15 + 6y

4(15 + 6y) + y = 10

60 + 24y + y = 10

25y = 10 - 60

25y = - 50

y = - 2

x = 15 + 6(-2)

x = 15 - 12

x = 3

ala cu supra nu inteleg ce scrie