Incremental Calculator II for the Substituttion 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) ----> Solve for y =
x +
(eq.4)
Plug-in the right side of eq.4 into the second equation:
x +
(
x +
) =
(eq.5)
Simplify eq.5:
x +
x +
=
(eq.6)
x =
---> x =
(eq.7)
Plug the solution x from eq.7 into equation 4.
y =
(
) +
----> y =
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