Whakaoti mō x
x=9
Graph
Tohaina
Kua tāruatia ki te papatopenga
21+7x=2x-6+48-4\left(3-x\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te x-3.
21+7x=2x+42-4\left(3-x\right)
Tāpirihia te -6 ki te 48, ka 42.
21+7x=2x+42-12+4x
Whakamahia te āhuatanga tohatoha hei whakarea te -4 ki te 3-x.
21+7x=2x+30+4x
Tangohia te 12 i te 42, ka 30.
21+7x=6x+30
Pahekotia te 2x me 4x, ka 6x.
21+7x-6x=30
Tangohia te 6x mai i ngā taha e rua.
21+x=30
Pahekotia te 7x me -6x, ka x.
x=30-21
Tangohia te 21 mai i ngā taha e rua.
x=9
Tangohia te 21 i te 30, ka 9.
Ngā Tauira
whārite tapawhā
{ x } ^ { 2 } - 4 x - 5 = 0
Āhuahanga
4 \sin \theta \cos \theta = 2 \sin \theta
whārite paerangi
y = 3x + 4
Arithmetic
699 * 533
Poukapa
\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]
whārite Simultaneous
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Whakarerekētanga
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Whakaurunga
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Ngā Tepe
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}