Solve for z
z=-1
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3z-2+4-4z=5\left(1-2z\right)-12
Use the distributive property to multiply 4 by 1-z.
3z+2-4z=5\left(1-2z\right)-12
Add -2 and 4 to get 2.
-z+2=5\left(1-2z\right)-12
Combine 3z and -4z to get -z.
-z+2=5-10z-12
Use the distributive property to multiply 5 by 1-2z.
-z+2=-7-10z
Subtract 12 from 5 to get -7.
-z+2+10z=-7
Add 10z to both sides.
9z+2=-7
Combine -z and 10z to get 9z.
9z=-7-2
Subtract 2 from both sides.
9z=-9
Subtract 2 from -7 to get -9.
z=\frac{-9}{9}
Divide both sides by 9.
z=-1
Divide -9 by 9 to get -1.
Examples
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y = 3x + 4
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\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}