Question

select a pair of simultaneous equations
2x+2y=7
4x+3z=9
3y+4z=8
3z+9x=18

Answer 1

$\underline{\pink{ Pair \:of \: simultaneous \:equations :}}$

Two linear equations in the same two variables are called a pair of linear equations in two variables.

$\blue { a_{1}x + b_{1}y + c_{1} = 0 , \: (a^{2}_{1}+b^{2}_{1}\neq 0 ) }$

$\orange { a_{2}x + b_{2}y + c_{2} = 0 , \: (a^{2}_{2}+b^{2}_{2}\neq 0 ) }$

$Here, 4\blue {x} + 3\orange{z} = 9$

$and , \:9\blue {x} + 3\orange{z} = 18 \: are \\pair \: of \: simultaneous \:equations \: in \:two \\varibles \: \blue{x} \: and \: \orange {z} .$

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Answer 2

Answer:

This is the answer because both equations have same variables