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9\left(2x+3\right)+4\left(3x+4\right)=72\times 10
Me whakarea ngā taha e rua o te whārite ki te 36, arā, te tauraro pātahi he tino iti rawa te kitea o 4,9.
18x+27+4\left(3x+4\right)=72\times 10
Whakamahia te āhuatanga tohatoha hei whakarea te 9 ki te 2x+3.
18x+27+12x+16=72\times 10
Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te 3x+4.
30x+27+16=72\times 10
Pahekotia te 18x me 12x, ka 30x.
30x+43=72\times 10
Tāpirihia te 27 ki te 16, ka 43.
30x+43=720
Whakareatia te 72 ki te 10, ka 720.
30x=720-43
Tangohia te 43 mai i ngā taha e rua.
30x=677
Tangohia te 43 i te 720, ka 677.
x=\frac{677}{30}
Whakawehea ngā taha e rua ki te 30.