Page 60 - CalcBus_Flipbook

6-12 Equations and Formulas CH 6]

Solution values are to be the same. When the same, the combining similar terms solution is correct.

Example:
40. 0.5x - 0.3y - 0.2x + 0.7y =
Solution:
0.5x - 0.2x + 0.7y - 0.3y =
0.3x + 0.4y =

Test Solutions: Set values to the variables and solve for the original equation and the solution equation.
x = 8, y = 4
With original equation
Example:
Solution 40. 0.5x - - 0.3y - - 0.2x + 0.7y =
0.3(4) -
0.7(4) =

0.2(8)
+
0.5(8)
1.6
1.2
-
+
2.8
4
=
2.8 - 1.6 + 2.8 =
1.2 + 2.8 = 4
With combined solution
0.3x + 0.4y =
0.3(8) + 0.4(4) =
2.4 + 1.6 = 4

Solution values are to be the same. When the arithmetic solutions are the same, the combining similar terms
solution is correct.

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