F+t-5+4=12

Solution for F+t-5+4=12 equation:

Simplifying
F + t + -5 + 4 = 12

Reorder the terms:
-5 + 4 + F + t = 12

Combine like terms: -5 + 4 = -1
-1 + F + t = 12

Solving
-1 + F + t = 12

Solving for variable 'F'.

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

Add '1' to each side of the equation.
-1 + F + 1 + t = 12 + 1

Reorder the terms:
-1 + 1 + F + t = 12 + 1

Combine like terms: -1 + 1 = 0
0 + F + t = 12 + 1
F + t = 12 + 1

Combine like terms: 12 + 1 = 13
F + t = 13

Add '-1t' to each side of the equation.
F + t + -1t = 13 + -1t

Combine like terms: t + -1t = 0
F + 0 = 13 + -1t
F = 13 + -1t

Simplifying
F = 13 + -1t