Solve for x
x=0.9
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2x+1.8=3.6
Swap sides so that all variable terms are on the left hand side.
2x=3.6-1.8
Subtract 1.8 from both sides.
2x=1.8
Subtract 1.8 from 3.6 to get 1.8.
x=\frac{1.8}{2}
Divide both sides by 2.
x=\frac{18}{20}
Expand \frac{1.8}{2} by multiplying both numerator and the denominator by 10.
x=\frac{9}{10}
Reduce the fraction \frac{18}{20} to lowest terms by extracting and canceling out 2.
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