Solve for x
x = \frac{8}{5} = 1\frac{3}{5} = 1.6
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\frac{4}{5}\times \frac{3}{4}x+\frac{4}{5}\times 3=4-\frac{2}{5}x
Use the distributive property to multiply \frac{4}{5} by \frac{3}{4}x+3.
\frac{4\times 3}{5\times 4}x+\frac{4}{5}\times 3=4-\frac{2}{5}x
Multiply \frac{4}{5} times \frac{3}{4} by multiplying numerator times numerator and denominator times denominator.
\frac{3}{5}x+\frac{4}{5}\times 3=4-\frac{2}{5}x
Cancel out 4 in both numerator and denominator.
\frac{3}{5}x+\frac{4\times 3}{5}=4-\frac{2}{5}x
Express \frac{4}{5}\times 3 as a single fraction.
\frac{3}{5}x+\frac{12}{5}=4-\frac{2}{5}x
Multiply 4 and 3 to get 12.
\frac{3}{5}x+\frac{12}{5}+\frac{2}{5}x=4
Add \frac{2}{5}x to both sides.
x+\frac{12}{5}=4
Combine \frac{3}{5}x and \frac{2}{5}x to get x.
x=4-\frac{12}{5}
Subtract \frac{12}{5} from both sides.
x=\frac{20}{5}-\frac{12}{5}
Convert 4 to fraction \frac{20}{5}.
x=\frac{20-12}{5}
Since \frac{20}{5} and \frac{12}{5} have the same denominator, subtract them by subtracting their numerators.
x=\frac{8}{5}
Subtract 12 from 20 to get 8.
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y = 3x + 4
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Matrix
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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
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