9m + 2 = 3m − 10
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[ ]
[ ] [ ]
[ ]
9 2 3 10
2 10
6
6
6
12
m m
m
m
m
m
+= −
− −
+= −
− −
=
− =
=

To collect on left
side, subtract
from both sides.
Subtract from
both sides.
Divide by .

Check: Substitute into the
original equation.
9m + 2 = 3m − 10
9() + 2 ?

= 3() − 10
+ 2 ?
= − 10
=

2. −7d − 22 = 4d
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[ ]
4
7 22
22 11
22 11
d d
d
d
d
− − =
+ +
− =
− =
=

To collect on right
side, add
to both sides.
Divide by .

Check: Substitute into the
original equation.
−7d − 22 = 4d
−7() − 22 ?
= 4()
−22 ?
=
=