Once you have simplified the equation, use reverse BIDMAS (also called SAMDIB)
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Reverse BIDMAS (SAMDIB)
Once you have simplified the equation, use reverse
BIDMAS (also called SAMDIB).
To do this we do the reciprocal (opposite) of each
operation.
A Example:
S
1. Choose the word whose underlined part is pronounced differently from that of the
others
energetic
rehearse
prchestra
relax
assignment
environment
Choose the word that has a different stress pattern from that of the others
nvite
empty
pretty
D. pollution
vacation
Mmtiple choice
Solving with 2 Variables EMGEdue
Sometimes equations have two variables. Follow these
steps to solve:
• Step 1: Replace the known
If z = 6, solve for r:
5z + 7r = 79
variable with its value.
• Step 2: Use BIDMAS to simplify
all terms on the variable side of
(5 x 6) + 7r = 79
the equation.
• Step 3: Use SAMDIB and
reciprocals to move all non-
30 + 7r = 79
variable numbers to the other side
of the equal sign.
Reverse BIDMAS (SAMDIB)
Once you have simplified the equation, use reverse
BIDMAS (also called SAMDIB).
To do this we do the reciprocal (opposite) of each
operation.
A Example:
S
1. Choose the word whose underlined part is pronounced differently from that of the
others
energetic
rehearse
prchestra
relax
assignment
environment
Choose the word that has a different stress pattern from that of the others
nvite
empty
pretty
D. pollution
vacation
Mmtiple choice
Solving with 2 Variables EMGEdue
Sometimes equations have two variables. Follow these
steps to solve:
• Step 1: Replace the known
If z = 6, solve for r:
5z + 7r = 79
variable with its value.
• Step 2: Use BIDMAS to simplify
all terms on the variable side of
(5 x 6) + 7r = 79
the equation.
• Step 3: Use SAMDIB and
reciprocals to move all non-
30 + 7r = 79
variable numbers to the other side
of the equal sign.