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19.98+4.6t=-19.99-0.9t-6.78
We move all terms to the left:
19.98+4.6t-(-19.99-0.9t-6.78)=0
We add all the numbers together, and all the variables
4.6t-(-0.9t-26.77)+19.98=0
We get rid of parentheses
4.6t+0.9t+26.77+19.98=0
We add all the numbers together, and all the variables
5.5t+46.75=0
We move all terms containing t to the left, all other terms to the right
5.5t=-46.75
t=-46.75/5.5
t=-8+2.75/5.5
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