(ii) 2x + 3y + z and 2x - y- z Add the following by both horizontal and column method
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Equation (I) 2x + 3y + z
Equation (II) 2x - y - z
1) Horizontal method :-
( 2x + 3y + z ) + ( 2x - y - z)
2x + 3y + z + 2x - y - z
2x + 2x + 3y - y + z - z
4x + 2y
2) Vertical method :-
2x + 3y + z
+ 2x - y - z
4x + 2y
Therefore the answer is 4x + 2y.
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