The variable used in the equation 2p + 8 = 18 is ___ .
Given equation is 2p + 8 = 18.
A variable is a letter that represents an unknown quantity which can take any value.
∴The variable used in the equation 2p + 8 = 18 is p.
Match the items of Column I with that of Column II.
Column IColumn II(i)The number of corners of a quadrilaeral(a)=(ii)The variable in the equation 2p+3=5(b)constant(iii)The solution of the equation x+2=3(c)+1(iv)solution of the equation 2p+3=5(d)−1(v)A sign used in an equation(e)p(f)x