Question 104514
Understand now?

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<color=orange> Simplifying
1p + -1 + -1q = 1f

Reorder the terms:
-1 + 1p + -1q = 1f

Solving
-1 + 1p + -1q = 1f

Solving for variable 'p'.

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

Add '1' to each side of the equation.
-1 + 1p + 1 + -1q = 1 + 1f

Reorder the terms:
-1 + 1 + 1p + -1q = 1 + 1f

Combine like terms: -1 + 1 = 0
0 + 1p + -1q = 1 + 1f
1p + -1q = 1 + 1f

Add 'q' to each side of the equation.
1p + -1q + q = 1 + 1f + q

Combine like terms: -1q + q = 0
1p + 0 = 1 + 1f + q
1p = 1 + 1f + q

Divide each side by '1'.
p = 1 + 1f + q

Simplifying
p = 1 + 1f + q </color>