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30\left(5x+7\right)-15\left(3x+5\right)=24\left(4x+9\right)-40\left(x-9\right)
Me whakarea ngā taha e rua o te whārite ki te 120, arā, te tauraro pātahi he tino iti rawa te kitea o 4,8,5,3.
150x+210-15\left(3x+5\right)=24\left(4x+9\right)-40\left(x-9\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 30 ki te 5x+7.
150x+210-45x-75=24\left(4x+9\right)-40\left(x-9\right)
Whakamahia te āhuatanga tohatoha hei whakarea te -15 ki te 3x+5.
105x+210-75=24\left(4x+9\right)-40\left(x-9\right)
Pahekotia te 150x me -45x, ka 105x.
105x+135=24\left(4x+9\right)-40\left(x-9\right)
Tangohia te 75 i te 210, ka 135.
105x+135=96x+216-40\left(x-9\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 24 ki te 4x+9.
105x+135=96x+216-40x+360
Whakamahia te āhuatanga tohatoha hei whakarea te -40 ki te x-9.
105x+135=56x+216+360
Pahekotia te 96x me -40x, ka 56x.
105x+135=56x+576
Tāpirihia te 216 ki te 360, ka 576.
105x+135-56x=576
Tangohia te 56x mai i ngā taha e rua.
49x+135=576
Pahekotia te 105x me -56x, ka 49x.
49x=576-135
Tangohia te 135 mai i ngā taha e rua.
49x=441
Tangohia te 135 i te 576, ka 441.
x=\frac{441}{49}
Whakawehea ngā taha e rua ki te 49.
x=9
Whakawehea te 441 ki te 49, kia riro ko 9.