p-7.8=4.2

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Solution for p-7.8=4.2 equation: 


Simplifying
p + -7.8 = 4.2

Reorder the terms:
-7.8 + p = 4.2

Solving
-7.8 + p = 4.2

Solving for variable 'p'.

Move all terms containing p to the left, all other terms to the right.

Add '7.8' to each side of the equation.
-7.8 + 7.8 + p = 4.2 + 7.8

Combine like terms: -7.8 + 7.8 = 0.0
0.0 + p = 4.2 + 7.8
p = 4.2 + 7.8

Combine like terms: 4.2 + 7.8 = 12
p = 12

Simplifying
p = 12

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