The given system of equations is equivalent. Then option C is correct.
An equation is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.
The system of equations can be solved as:-
y = -x + 4 ............1
2x +2y = 8 ...........2
2( x+ y ) = 8
x + y = 4
y = -x + 4
The two equations are equivalent. Hence, option C is correct.
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