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\frac{x+9x}{4}+\frac{3x}{2}+30=x
Since \frac{x}{4} and \frac{9x}{4} have the same denominator, add them by adding their numerators.
\frac{10x}{4}+\frac{3x}{2}+30=x
Combine like terms in x+9x.
\frac{10x}{4}+\frac{2\times 3x}{4}+30=x
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 4 and 2 is 4. Multiply \frac{3x}{2} times \frac{2}{2}.
\frac{10x+2\times 3x}{4}+30=x
Since \frac{10x}{4} and \frac{2\times 3x}{4} have the same denominator, add them by adding their numerators.
\frac{10x+6x}{4}+30=x
Do the multiplications in 10x+2\times 3x.
\frac{16x}{4}+30=x
Combine like terms in 10x+6x.
4x+30=x
Divide 16x by 4 to get 4x.
4x+30-x=0
Subtract x from both sides.
3x+30=0
Combine 4x and -x to get 3x.
3x=-30
Subtract 30 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-30}{3}
Divide both sides by 3.
x=-10
Divide -30 by 3 to get -10.