(7+-21)+(t+4)=15

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Solution for (7+-21)+(t+4)=15 equation:


Simplifying
(7 + -21) + (t + 4) = 15

Combine like terms: 7 + -21 = -14
(-14) + (t + 4) = 15
-14 + (t + 4) = 15

Reorder the terms:
-14 + (4 + t) = 15

Remove parenthesis around (4 + t)
-14 + 4 + t = 15

Combine like terms: -14 + 4 = -10
-10 + t = 15

Solving
-10 + t = 15

Solving for variable 't'.

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

Add '10' to each side of the equation.
-10 + 10 + t = 15 + 10

Combine like terms: -10 + 10 = 0
0 + t = 15 + 10
t = 15 + 10

Combine like terms: 15 + 10 = 25
t = 25

Simplifying
t = 25

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