Whakaoti mō x
x=24
Graph
Tohaina
Kua tāruatia ki te papatopenga
0.9x-21-0.2x=-4.2
Tangohia te 0.2x mai i ngā taha e rua.
0.7x-21=-4.2
Pahekotia te 0.9x me -0.2x, ka 0.7x.
0.7x=-4.2+21
Me tāpiri te 21 ki ngā taha e rua.
0.7x=16.8
Tāpirihia te -4.2 ki te 21, ka 16.8.
x=\frac{16.8}{0.7}
Whakawehea ngā taha e rua ki te 0.7.
x=\frac{168}{7}
Whakarohaina te \frac{16.8}{0.7} mā te whakarea i te taurunga me te tauraro ki te 10.
x=24
Whakawehea te 168 ki te 7, kia riro ko 24.
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}