16x-8y=3x+y+80 2x+8y=x+5y+32 решите пожалуйсто матодом сложения!!!!!!

16x - 8y = 3x + y + 80
2x + 8y = x + 5y + 32
Решение
16х + 2x - 8y + 8y = 3x + x + y + 5y + 80 + 32
18x = 4x + 6y + 112
14x = 6y + 112
x = 3/7y + 8
2x + 8y = x + 5y + 32
x = - 3y + 32
3/7y + 8 = - 3y + 32
3y + 56 = - 21y + 224
24y = 168
y = 7
x = - 21 + 32 = 11
Ответ ( 11 ; 7 )

16x-8y=3x+y+80
2x+8y=x+5y+32

16x-8y-3x-y-80=0
2x+8y-x-5y-32=0

13x-9y-80=0
x+3y-32=0x3


13x-9y-80=0
3x+9y-96=0

13x-9y-80=0
+
3x+9y-96=0
=
16x-176=0
16x=176
x=176/16=11

11+3y-32=0
3y=32-11
3y=21
y=21/3=7