If (1,-2)is a solution of eqn. 2x-y=p then find value of p
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x = 1
y = -2
2x - y = p
p = 2 × 1 - (-2)
p = 2 + 2
p = 4
y = -2
2x - y = p
p = 2 × 1 - (-2)
p = 2 + 2
p = 4
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