Question

800-(y*8-20)=100 помогите решить,плиз

Answer 1

800-(y×8-20)=100
y×8-20=800-100
y×8-20=700
y×8=700+20
y×8=720
y=720:8
y=90

Answer 2

800-(y×8-20)=100
y×8-20=800-100
y×8-20=700
y×8=700+20
y×8=720
y=720:8
y=90

Answer 3

у*8-20=800-100

у*8-20=700

у*8=700+20

у*8=720

у=720:8=90