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12\left(3\times 5+2\right)y+15\left(1\times 4+1\right)=20\left(7\times 3+1\right)
Me whakarea ngā taha e rua o te whārite ki te 60, arā, te tauraro pātahi he tino iti rawa te kitea o 5,4,3.
12\left(15+2\right)y+15\left(1\times 4+1\right)=20\left(7\times 3+1\right)
Whakareatia te 3 ki te 5, ka 15.
12\times 17y+15\left(1\times 4+1\right)=20\left(7\times 3+1\right)
Tāpirihia te 15 ki te 2, ka 17.
204y+15\left(1\times 4+1\right)=20\left(7\times 3+1\right)
Whakareatia te 12 ki te 17, ka 204.
204y+15\left(4+1\right)=20\left(7\times 3+1\right)
Whakareatia te 1 ki te 4, ka 4.
204y+15\times 5=20\left(7\times 3+1\right)
Tāpirihia te 4 ki te 1, ka 5.
204y+75=20\left(7\times 3+1\right)
Whakareatia te 15 ki te 5, ka 75.
204y+75=20\left(21+1\right)
Whakareatia te 7 ki te 3, ka 21.
204y+75=20\times 22
Tāpirihia te 21 ki te 1, ka 22.
204y+75=440
Whakareatia te 20 ki te 22, ka 440.
204y=440-75
Tangohia te 75 mai i ngā taha e rua.
204y=365
Tangohia te 75 i te 440, ka 365.
y=\frac{365}{204}
Whakawehea ngā taha e rua ki te 204.