You just plug in the value of the given variable. For example:
y=3+2
2y=x (now you substitute y for 3+2)
2(3+2)=x (now solve the equation using distributive property)
6+4=x
10=x
Tuhduh!! All done using the substitution property.
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Elimination and substitution are two methods.
2x+7y=29 x=37-8y
True. To solve a three variable system of equations you can use a combination of the elimination and substitution methods.
To solve linear equations, you always use the inverse operations
You simplify the brackets first and then you will have linear equations without brackets!