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\frac{\left(2x+3.6+3.6+3.8+4+4.5\right)\times 3+4-3.6+1.9\times 13.5}{21+13.5}=3
Combine x and x to get 2x.
\frac{\left(2x+7.2+3.8+4+4.5\right)\times 3+4-3.6+1.9\times 13.5}{21+13.5}=3
Add 3.6 and 3.6 to get 7.2.
\frac{\left(2x+11+4+4.5\right)\times 3+4-3.6+1.9\times 13.5}{21+13.5}=3
Add 7.2 and 3.8 to get 11.
\frac{\left(2x+15+4.5\right)\times 3+4-3.6+1.9\times 13.5}{21+13.5}=3
Add 11 and 4 to get 15.
\frac{\left(2x+19.5\right)\times 3+4-3.6+1.9\times 13.5}{21+13.5}=3
Add 15 and 4.5 to get 19.5.
\frac{\left(2x+19.5\right)\times 3+0.4+1.9\times 13.5}{21+13.5}=3
Subtract 3.6 from 4 to get 0.4.
\frac{\left(2x+19.5\right)\times 3+0.4+25.65}{21+13.5}=3
Multiply 1.9 and 13.5 to get 25.65.
\frac{\left(2x+19.5\right)\times 3+26.05}{21+13.5}=3
Add 0.4 and 25.65 to get 26.05.
\frac{\left(2x+19.5\right)\times 3+26.05}{34.5}=3
Add 21 and 13.5 to get 34.5.
\frac{6x+58.5+26.05}{34.5}=3
Use the distributive property to multiply 2x+19.5 by 3.
\frac{6x+84.55}{34.5}=3
Add 58.5 and 26.05 to get 84.55.
\frac{6x}{34.5}+\frac{84.55}{34.5}=3
Divide each term of 6x+84.55 by 34.5 to get \frac{6x}{34.5}+\frac{84.55}{34.5}.
\frac{4}{23}x+\frac{84.55}{34.5}=3
Divide 6x by 34.5 to get \frac{4}{23}x.
\frac{4}{23}x+\frac{8455}{3450}=3
Expand \frac{84.55}{34.5} by multiplying both numerator and the denominator by 100.
\frac{4}{23}x+\frac{1691}{690}=3
Reduce the fraction \frac{8455}{3450} to lowest terms by extracting and canceling out 5.
\frac{4}{23}x=3-\frac{1691}{690}
Subtract \frac{1691}{690} from both sides.
\frac{4}{23}x=\frac{2070}{690}-\frac{1691}{690}
Convert 3 to fraction \frac{2070}{690}.
\frac{4}{23}x=\frac{2070-1691}{690}
Since \frac{2070}{690} and \frac{1691}{690} have the same denominator, subtract them by subtracting their numerators.
\frac{4}{23}x=\frac{379}{690}
Subtract 1691 from 2070 to get 379.
x=\frac{\frac{379}{690}}{\frac{4}{23}}
Divide both sides by \frac{4}{23}.
x=\frac{379}{690\times \frac{4}{23}}
Express \frac{\frac{379}{690}}{\frac{4}{23}} as a single fraction.
x=\frac{379}{120}
Multiply 690 and \frac{4}{23} to get 120.