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Assuming the simplest case of two equations in two variable: solve one of the equations for one of the variables. Substitute the value found for the variable in all places in which the variable appears in the second equation. Solve the resulting equation. This will give you the value of one of the variables. Finally, replace this value in one of the original equations, and solve, to find the other variable.
What else can I help you with?
Why did the Germans invade Russia?
Because Adolph Hitler was a Doi-doi-doi.
What is bigger a zebra or a chimp?
An elephant. Doi doi
When was Masaki Doi born?
Masaki Doi was born in 1960.
When was Hiroaki Doi born?
Hiroaki Doi was born in 1978.
What is Choeng Doi's population?
The population of Choeng Doi is 10,750.
When was Tōru Doi born?
Tōru Doi was born in 1958.
When did Michiyoshi Doi die?
Michiyoshi Doi died in 1975.
When was Michiyoshi Doi born?
Michiyoshi Doi was born in 1926.
When was Ryuichi Doi born?
Ryuichi Doi was born in 1939.
What is Doi Hang's population?
Doi Hang's population is 4,444.
When did Isami Doi die?
Isami Doi died in 1965.
What is the population of Doi Lo?
Doi Lo's population is 12,809.
