Solve for x
x = -\frac{15}{7} = -2\frac{1}{7} \approx -2.142857143
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3x+5=2\left(5x+10\right)
Multiply both sides of the equation by 4, the least common multiple of 4,2.
3x+5=10x+20
Use the distributive property to multiply 2 by 5x+10.
3x+5-10x=20
Subtract 10x from both sides.
-7x+5=20
Combine 3x and -10x to get -7x.
-7x=20-5
Subtract 5 from both sides.
-7x=15
Subtract 5 from 20 to get 15.
x=\frac{15}{-7}
Divide both sides by -7.
x=-\frac{15}{7}
Fraction \frac{15}{-7} can be rewritten as -\frac{15}{7} by extracting the negative sign.
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
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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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