18=12-(t-3)

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Solution for 18=12-(t-3) equation:


Simplifying
18 = 12 + -1(t + -3)

Reorder the terms:
18 = 12 + -1(-3 + t)
18 = 12 + (-3 * -1 + t * -1)
18 = 12 + (3 + -1t)

Combine like terms: 12 + 3 = 15
18 = 15 + -1t

Solving
18 = 15 + -1t

Solving for variable 't'.

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

Add 't' to each side of the equation.
18 + t = 15 + -1t + t

Combine like terms: -1t + t = 0
18 + t = 15 + 0
18 + t = 15

Add '-18' to each side of the equation.
18 + -18 + t = 15 + -18

Combine like terms: 18 + -18 = 0
0 + t = 15 + -18
t = 15 + -18

Combine like terms: 15 + -18 = -3
t = -3

Simplifying
t = -3

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