Incremental Calculator I for the Substitution Method
Solve:
a
11
x + a
12
y = b
1
a
21
x + a
22
y = b
2
x +
y =
(eq.1)
x +
y =
(eq.2)
Solve the first equation for y:
(note that we could solve first for x as well)
y =
x +
(eq.3)
Plug-in the the right side of eq.3 into the eq.2.
x +
x +
=
(eq.4)
and simplify x =
(eq.5)
Plug-in eq.5 into eq.2 to get the value of y:
y =
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