exam Maths Puzzle Numerical Ability

Need help in solving this it is not a test but for our homework. Every way I have worked it I get a different answer. 0.4p+0.2=4.2p-7.8-0.6p

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Translate to an algebra statement:

Five times the difference of a number and one yields the same result as twice the same number increased by three.
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WHAT LINEAR EQUATION REPRESENTS THIS SITTUATION?