3(7+3t)=-t

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Solution for 3(7+3t)=-t equation:


Simplifying
3(7 + 3t) = -1t
(7 * 3 + 3t * 3) = -1t
(21 + 9t) = -1t

Solving
21 + 9t = -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.
21 + 9t + t = -1t + t

Combine like terms: 9t + t = 10t
21 + 10t = -1t + t

Combine like terms: -1t + t = 0
21 + 10t = 0

Add '-21' to each side of the equation.
21 + -21 + 10t = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 10t = 0 + -21
10t = 0 + -21

Combine like terms: 0 + -21 = -21
10t = -21

Divide each side by '10'.
t = -2.1

Simplifying
t = -2.1

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