5x+2y=100 x+8=y Prosze o rozwiazanie :))

5x+2y=100 x+8=y 5x+2y=100 x=y-8 5(y-8)+2y=100 x=y-8 5y-40=100 x=y-8 5y=140 /:5 x=y-8 y=28 x=28-8 y=28 x=20