Whakaoti mō x
x=30
Graph
Tohaina
Kua tāruatia ki te papatopenga
28x=21x+210
Whakamahia te āhuatanga tohatoha hei whakarea te 21 ki te x+10.
28x-21x=210
Tangohia te 21x mai i ngā taha e rua.
7x=210
Pahekotia te 28x me -21x, ka 7x.
x=\frac{210}{7}
Whakawehea ngā taha e rua ki te 7.
x=30
Whakawehea te 210 ki te 7, kia riro ko 30.
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