T-(-9)=21

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Solution for T-(-9)=21 equation: 


Simplifying
T + -1(-9) = 21

Multiply -1 * -9
T + 9 = 21

Reorder the terms:
9 + T = 21

Solving
9 + T = 21

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 + T = 21 + -9

Combine like terms: 9 + -9 = 0
0 + T = 21 + -9
T = 21 + -9

Combine like terms: 21 + -9 = 12
T = 12

Simplifying
T = 12

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