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\left(t+3\right)\left(3t-1\right)=\left(t+3\right)\left(3t+1\right)\times 2-\left(3t+1\right)\left(t-3\right)
Variable t cannot be equal to any of the values -3,-\frac{1}{3} since division by zero is not defined. Multiply both sides of the equation by \left(t+3\right)\left(3t+1\right), the least common multiple of 3t+1,t+3.
3t^{2}+8t-3=\left(t+3\right)\left(3t+1\right)\times 2-\left(3t+1\right)\left(t-3\right)
Use the distributive property to multiply t+3 by 3t-1 and combine like terms.
3t^{2}+8t-3=\left(3t^{2}+10t+3\right)\times 2-\left(3t+1\right)\left(t-3\right)
Use the distributive property to multiply t+3 by 3t+1 and combine like terms.
3t^{2}+8t-3=6t^{2}+20t+6-\left(3t+1\right)\left(t-3\right)
Use the distributive property to multiply 3t^{2}+10t+3 by 2.
3t^{2}+8t-3=6t^{2}+20t+6-\left(3t^{2}-8t-3\right)
Use the distributive property to multiply 3t+1 by t-3 and combine like terms.
3t^{2}+8t-3=6t^{2}+20t+6-3t^{2}+8t+3
To find the opposite of 3t^{2}-8t-3, find the opposite of each term.
3t^{2}+8t-3=3t^{2}+20t+6+8t+3
Combine 6t^{2} and -3t^{2} to get 3t^{2}.
3t^{2}+8t-3=3t^{2}+28t+6+3
Combine 20t and 8t to get 28t.
3t^{2}+8t-3=3t^{2}+28t+9
Add 6 and 3 to get 9.
3t^{2}+8t-3-3t^{2}=28t+9
Subtract 3t^{2} from both sides.
8t-3=28t+9
Combine 3t^{2} and -3t^{2} to get 0.
8t-3-28t=9
Subtract 28t from both sides.
-20t-3=9
Combine 8t and -28t to get -20t.
-20t=9+3
Add 3 to both sides.
-20t=12
Add 9 and 3 to get 12.
t=\frac{12}{-20}
Divide both sides by -20.
t=-\frac{3}{5}
Reduce the fraction \frac{12}{-20} to lowest terms by extracting and canceling out 4.