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Tohaina

39=3\times 3\left(p+2\right)-2\times 2\left(p+1\right)
Me whakarea ngā taha e rua o te whārite ki te 6, arā, te tauraro pātahi he tino iti rawa te kitea o 2,3.
39=9\left(p+2\right)-4\left(p+1\right)
Whakareatia te 3 ki te 3, ka 9. Whakareatia te -2 ki te 2, ka -4.
39=9p+18-4\left(p+1\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 9 ki te p+2.
39=9p+18-4p-4
Whakamahia te āhuatanga tohatoha hei whakarea te -4 ki te p+1.
39=5p+18-4
Pahekotia te 9p me -4p, ka 5p.
39=5p+14
Tangohia te 4 i te 18, ka 14.
5p+14=39
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
5p=39-14
Tangohia te 14 mai i ngā taha e rua.
5p=25
Tangohia te 14 i te 39, ka 25.
p=\frac{25}{5}
Whakawehea ngā taha e rua ki te 5.
p=5
Whakawehea te 25 ki te 5, kia riro ko 5.