solve the equation

Multiply the terms in brackets by the 0.5:

0.5y + 0.5*1 - 0.2y = 2

 

Collect the terms in y:

0.3y +0.5 = 2

 

Subtract 0.5 from both sides

0.3y = 1.5

 

Divide both sides by 0.3

y = 5