Solve for a
a=\frac{3}{130}\approx 0.023076923
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0.1+6.5a=0.25
Swap sides so that all variable terms are on the left hand side.
6.5a=0.25-0.1
Subtract 0.1 from both sides.
6.5a=0.15
Subtract 0.1 from 0.25 to get 0.15.
a=\frac{0.15}{6.5}
Divide both sides by 6.5.
a=\frac{15}{650}
Expand \frac{0.15}{6.5} by multiplying both numerator and the denominator by 100.
a=\frac{3}{130}
Reduce the fraction \frac{15}{650} to lowest terms by extracting and canceling out 5.
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