Question

Выразите y:(0.5(x+y)/3z+0.5(x+y)/z=20. Более менее подробно.

Answer 1

(0.5(x+y)/3z+0.5(x+y)/z=20

0.5(x+y) +3*0.5(x+y)=3z*20

0.5x+0.5y+3*0.5*(x+y)-3z*20=0

0.5x+0.5y+1.5*(x+y)-3z*20=0

0.5x+0.5y+1.5x+1.5y-3z*20=0

2x+0.5y+1.5y-3z*20=0

2x+2y-3z*20=0

2x+2y-60z=0
x+y=30z

y=30z-x