If the graph of equation $a x+3 y=21$ passes through the point $(5,2)$ then the value of $a=\ldots \ldots \ldots$
$7$
$3$
$5$
$6$
Express the following linear equation in the form $a x+b y+c=0$ and indicate the values of $a, b$ and $c$ in each case
$2 y-3 x=14$
Write whether the following statements are True or False? Justify your answers:
The graph of every linear equation in two variables need not be a line.
Write each of the following as an equation in two varlables
$5 y=3$
Write each of the following as an equation in two variables
$\pi x=3.14$
Solve the equation $2 y+1=y+4$ and represent the solution(s) on $(1)$ the number line $(2)$ the Cartesian plane.
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