September 06, 2012
Lesson 2.2
The Multiplication Principle of Equality
Multiplication Principle of Equality
To clear a coefficient in an equation, multiply both sides
of the equation by the multiplicative inverse of that
coefficient or divide both sides by the coefficient.
Solve each using the multiplication principle of equality.
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September 06, 2012
Solving Linear Equations
To solve linear equations in one variables,
1. Simplify both sides of the equations as needed.
a) Distribute to clear parenthesis.
b) Combine like terms.
2. Use the addition principle so that all variable terms
are on one side of the equation and all constant terms
are on the other side. Then combine like terms.
3. Use the multiplication principle to clear any remaining
coefficients.
Solve.
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September 06, 2012
Solve.
Identity, all real numbers are solutions.
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September 06, 2012
w
x
12
15
w+2
y
6