Respuesta :
1y+40x=200
Original equation
40x+1y=200
-40x -40x=
y=200-40x
Substitue y equivalent
1(200-40x)+40x=200
200 - 40x +40x=200
Cancel out 40x (-+ equal positive = 0)
200=200 km travelled by bike
Original equation
40x+1y=200
-40x -40x=
y=200-40x
Substitue y equivalent
1(200-40x)+40x=200
200 - 40x +40x=200
Cancel out 40x (-+ equal positive = 0)
200=200 km travelled by bike