what is liner equation.??
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In mathematics, a linear equation is an equation that may be put in the form
{\displaystyle a_{1}x_{1}+\cdots +a_{n}x_{n}+b=0,}
{\displaystyle a_{1}x_{1}+\cdots +a_{n}x_{n}+b=0,}where {\displaystyle x_{1},\ldots ,x_{n}}x_{1},\ldots ,x_{n} are the variables (or unknowns), and {\displaystyle b,a_{1},\ldots ,a_{n}}{\displaystyle b,a_{1},\ldots ,a_{n}} are the coefficients, which are often real numbers. The coefficients may be considered as parameters of the equation, and may be arbitrary expressions, provided they do not contain any of the variables. To yield a meaningful equation, the coefficients {\displaystyle a_{1},\ldots ,a_{n}}a_1, \ldots, a_n are required to not all be zero.
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Q1.The sides of a triangle are 25cm, 39cm and 56cm respectively. Find the Given terms : ( I ) Area of the Triangle. ( II ) The altitude to the longest side of the Triangle.