Respuesta :

divide both sides by 10
x+3=0.9
minus 3
x=2.1
Solutions 

Divide both sides by 10

x+3=9 / 10

Subtract 3 from both sides

x=9 / 10 −3

 Simplify 9 / 10 −3 to 21 / 10

x=−21 / 10


Decimal = 
-2.1