X=y+3; xy-y=7 xy+x^2=4; y=x+2 4y+x=0; x^2+y^2=17 x+2y=1; - вопрос №37242402217212219913008 от НЕГЛУПЫЙ26 19.03.2022 00:02

Question

Математика: X=y+3; xy-y=7 xy+x^2=4; y=x+2 4y+x=0; x^2+y^2=17 x+2y=1; 2x+y^2=-1

НЕГЛУПЫЙ26 · Answer

216 : (16 - х) = 18 5у + 3(7у + 18) = 106

16 - х = 216 : 18 5у + 21у + 54 = 106

16 - х = 12 26у = 106 - 54

х = 16 - 12 26у = 52

х = 4 у = 52 : 26

у = 2

8х + 4(13х + 32) = 308 5(11х - 31) - 9х = 121

8х + 52х + 128 = 308 55х - 155 - 9х = 121

60х = 308 - 128 46х = 121 + 155

60х = 180 46х = 276

х = 180 : 60 х = 276 : 46

х = 3 х = 6