Solve for x
x=-3
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\frac{3}{2}x+\frac{12}{4}+\frac{3}{4}=\frac{1}{4}x
Convert 3 to fraction \frac{12}{4}.
\frac{3}{2}x+\frac{12+3}{4}=\frac{1}{4}x
Since \frac{12}{4} and \frac{3}{4} have the same denominator, add them by adding their numerators.
\frac{3}{2}x+\frac{15}{4}=\frac{1}{4}x
Add 12 and 3 to get 15.
\frac{3}{2}x+\frac{15}{4}-\frac{1}{4}x=0
Subtract \frac{1}{4}x from both sides.
\frac{5}{4}x+\frac{15}{4}=0
Combine \frac{3}{2}x and -\frac{1}{4}x to get \frac{5}{4}x.
\frac{5}{4}x=-\frac{15}{4}
Subtract \frac{15}{4} from both sides. Anything subtracted from zero gives its negation.
x=-\frac{15}{4}\times \frac{4}{5}
Multiply both sides by \frac{4}{5}, the reciprocal of \frac{5}{4}.
x=\frac{-15\times 4}{4\times 5}
Multiply -\frac{15}{4} times \frac{4}{5} by multiplying numerator times numerator and denominator times denominator.
x=\frac{-15}{5}
Cancel out 4 in both numerator and denominator.
x=-3
Divide -15 by 5 to get -3.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}