To find: the reason of substitution method helpful than elimination.
Answer to Problem 80HP
Substitution method is better.
Explanation of Solution
Given:
Substitution method and elimination method.
Concept used:
Elimination method:
Either add or subtract the equations to get an equation in one variable. When the coefficients of one variable are opposites add the equations to eliminate a variable and when the coefficients of one variable are equal or subtract the equation to eliminate a variable.
Substitution method:
In this method solving one of the equations for one variable and then plugging this back into the other equations “substituting” for the chosen variable and solving for the other. Then solve back for the first variable.
Calculation:
Substitution method is more helpful to use when one of the variable has a coefficient of
Hence, substitution method is better.
Chapter 3 Solutions
Glencoe Algebra 2 Student Edition C2014
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