Solve for t
t=-10
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0.9t-t=1
Subtract t from both sides.
-0.1t=1
Combine 0.9t and -t to get -0.1t.
t=\frac{1}{-0.1}
Divide both sides by -0.1.
t=\frac{10}{-1}
Expand \frac{1}{-0.1} by multiplying both numerator and the denominator by 10.
t=-10
Fraction \frac{10}{-1} can be rewritten as -10 by extracting the negative sign.
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