# Revision history [back]

### checking left hand side of an equation

Hi, I'd like to check if the operation applied to an equation yields the solution as follow: a=var('a') eq= a+7==6

print eq.lhs()
LHS =(eq-7).lhs()
print LHS
LHS==a


I was waiting that the last line yields True or False. How can I check that LHS contains the variable a?

### checking left hand side of an equation

Hi, I'd like to check if the operation applied to an equation yields the solution as follow: a=var('a') eq= a+7==6

print eq.lhs()
LHS =(eq-7).lhs()
print LHS
LHS==a
a is a
LHS is a


I was waiting that the last line yields True or False. How can I check that LHS contains the variable a?? edit LHS is a yields False

### checking left hand side of an equation

Hi, I'd like to check if the operation applied to an equation yields the solution as follow: a=var('a') eq= a+7==6

print eq.lhs()
LHS =(eq-7).lhs()
print LHS
LHS==a
a is a
LHS is a


I was waiting that the last line yields True or False. How can I check that LHS contains the variable a? ?

edit

LHS LHS is aa
 

yields False

### checking left hand side of an equation

Hi, I'd like to check if the operation applied to an equation yields the solution as follow: a=var('a') eq= a+7==6

print eq.lhs()
LHS =(eq-7).lhs()
print LHS
LHS==a
a is a
LHS is a


I was waiting that the last line LHS==a yields True or False. How can I check that LHS contains the variable a?

edit

LHS is a


yields False