Whakaoti mō x
x = \frac{35}{2} = 17\frac{1}{2} = 17.5
Graph
Tohaina
Kua tāruatia ki te papatopenga
2\left(2x-5\right)+4x-10=120
Me whakarea ngā taha e rua o te whārite ki te 20, arā, te tauraro pātahi he tino iti rawa te kitea o 10,20.
4x-10+4x-10=120
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 2x-5.
8x-10-10=120
Pahekotia te 4x me 4x, ka 8x.
8x-20=120
Tangohia te 10 i te -10, ka -20.
8x=120+20
Me tāpiri te 20 ki ngā taha e rua.
8x=140
Tāpirihia te 120 ki te 20, ka 140.
x=\frac{140}{8}
Whakawehea ngā taha e rua ki te 8.
x=\frac{35}{2}
Whakahekea te hautanga \frac{140}{8} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 4.
Ngā Tauira
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