draw the graph of linear equation 2x + y = 7. from the graph check whether [1,-2] is a solution of this graph.
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if x=1, y=(-2)
then
p(a)=2x+y=7
2(1) + y=7
2+y=7
y=7-2
y=5
2x+y=7
2(-2)+y =7
-4+y=7
y=7+5
y=12
hope it will help you
then
p(a)=2x+y=7
2(1) + y=7
2+y=7
y=7-2
y=5
2x+y=7
2(-2)+y =7
-4+y=7
y=7+5
y=12
hope it will help you
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