12-(t+3)=18

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


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

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

Combine like terms: 12 + -3 = 9
9 + -1t = 18

Solving
9 + -1t = 18

Solving for variable 't'.

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

Add '-9' to each side of the equation.
9 + -9 + -1t = 18 + -9

Combine like terms: 9 + -9 = 0
0 + -1t = 18 + -9
-1t = 18 + -9

Combine like terms: 18 + -9 = 9
-1t = 9

Divide each side by '-1'.
t = -9

Simplifying
t = -9

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