Finite Math Examples

Solve by Substitution -x-2y=-4 , x+2y=4
,
Step 1
Subtract from both sides of the equation.
Step 2
Replace all occurrences of with in each equation.
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Step 2.1
Replace all occurrences of in with .
Step 2.2
Simplify the left side.
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Step 2.2.1
Simplify .
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Step 2.2.1.1
Simplify each term.
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Step 2.2.1.1.1
Apply the distributive property.
Step 2.2.1.1.2
Multiply by .
Step 2.2.1.1.3
Multiply by .
Step 2.2.1.2
Combine the opposite terms in .
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Step 2.2.1.2.1
Subtract from .
Step 2.2.1.2.2
Add and .
Step 3
Remove any equations from the system that are always true.
Step 4