Solve for r
r=10
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3r-3-4\left(r-2\right)=-5
Use the distributive property to multiply 3 by r-1.
3r-3-4r+8=-5
Use the distributive property to multiply -4 by r-2.
-r-3+8=-5
Combine 3r and -4r to get -r.
-r+5=-5
Add -3 and 8 to get 5.
-r=-5-5
Subtract 5 from both sides.
-r=-10
Subtract 5 from -5 to get -10.
r=10
Multiply both sides by -1.
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
\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
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