Whakaoti mō x
x=\frac{19}{27}\approx 0.703703704
Graph
Tohaina
Kua tāruatia ki te papatopenga
21x-9=2\left(5-3x\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te 7x-3.
21x-9=10-6x
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 5-3x.
21x-9+6x=10
Me tāpiri te 6x ki ngā taha e rua.
27x-9=10
Pahekotia te 21x me 6x, ka 27x.
27x=10+9
Me tāpiri te 9 ki ngā taha e rua.
27x=19
Tāpirihia te 10 ki te 9, ka 19.
x=\frac{19}{27}
Whakawehea ngā taha e rua ki te 27.
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