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13=-2(2t-1)
We move all terms to the left:
13-(-2(2t-1))=0
We calculate terms in parentheses: -(-2(2t-1)), so:We get rid of parentheses
-2(2t-1)
We multiply parentheses
-4t+2
Back to the equation:
-(-4t+2)
4t-2+13=0
We add all the numbers together, and all the variables
4t+11=0
We move all terms containing t to the left, all other terms to the right
4t=-11
t=-11/4
t=-2+3/4
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