Whakaoti mō x
x=13
Graph
Tohaina
Kua tāruatia ki te papatopenga
\left(x-7\right)\times 7=\left(x+8\right)\times 2
Tē taea kia ōrite te tāupe x ki tētahi o ngā uara -8,7 nā te kore tautuhi i te whakawehenga mā te kore. Me whakarea ngā taha e rua o te whārite ki te \left(x-7\right)\left(x+8\right), arā, te tauraro pātahi he tino iti rawa te kitea o x+8,x-7.
7x-49=\left(x+8\right)\times 2
Whakamahia te āhuatanga tohatoha hei whakarea te x-7 ki te 7.
7x-49=2x+16
Whakamahia te āhuatanga tohatoha hei whakarea te x+8 ki te 2.
7x-49-2x=16
Tangohia te 2x mai i ngā taha e rua.
5x-49=16
Pahekotia te 7x me -2x, ka 5x.
5x=16+49
Me tāpiri te 49 ki ngā taha e rua.
5x=65
Tāpirihia te 16 ki te 49, ka 65.
x=\frac{65}{5}
Whakawehea ngā taha e rua ki te 5.
x=13
Whakawehea te 65 ki te 5, kia riro ko 13.
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