-4t-(-7t)+(-8t)-(-20t)+(-9t)=-18

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Solution for -4t-(-7t)+(-8t)-(-20t)+(-9t)=-18 equation: 


Simplifying
-4t + -1(-7t) + (-8t) + -1(-20t) + (-9t) = -18

Remove parenthesis around (-7t)
-4t + -1 * -7t + (-8t) + -1(-20t) + (-9t) = -18

Multiply -1 * -7
-4t + 7t + (-8t) + -1(-20t) + (-9t) = -18

Remove parenthesis around (-20t)
-4t + 7t + (-8t) + -1 * -20t + (-9t) = -18

Multiply -1 * -20
-4t + 7t + (-8t) + 20t + (-9t) = -18

Combine like terms: -4t + 7t = 3t
3t + (-8t) + 20t + (-9t) = -18

Combine like terms: 3t + (-8t) = -5t
-5t + 20t + (-9t) = -18

Combine like terms: -5t + 20t = 15t
15t + (-9t) = -18

Combine like terms: 15t + (-9t) = 6t
6t = -18

Solving
6t = -18

Solving for variable 't'.

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

Divide each side by '6'.
t = -3

Simplifying
t = -3

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