Whakaoti mō x
x = \frac{26}{7} = 3\frac{5}{7} \approx 3.714285714
Graph
Tohaina
Kua tāruatia ki te papatopenga
8x+20=3\left(5x-2\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te 2x+5.
8x+20=15x-6
Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te 5x-2.
8x+20-15x=-6
Tangohia te 15x mai i ngā taha e rua.
-7x+20=-6
Pahekotia te 8x me -15x, ka -7x.
-7x=-6-20
Tangohia te 20 mai i ngā taha e rua.
-7x=-26
Tangohia te 20 i te -6, ka -26.
x=\frac{-26}{-7}
Whakawehea ngā taha e rua ki te -7.
x=\frac{26}{7}
Ka taea te hautanga \frac{-26}{-7} te whakamāmā ki te \frac{26}{7} mā te tango tahi i te tohu tōraro i te taurunga me te tauraro.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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Whakarerekētanga
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Whakaurunga
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