二に元げん方ほう程てい式しき

noun

equation with two unknowns

Mathematical term for an equation containing two unknown variables, typically x and y.

• 二に元げん方ほう程てい式しきを解とくには、二ふたつの式しきが必ひつ要ようです。

  To solve an equation with two unknowns, you need two equations.