x-30 \% =21
Whakaoti mō x
x = \frac{213}{10} = 21\frac{3}{10} = 21.3
Graph
Tohaina
Kua tāruatia ki te papatopenga
x-\frac{3}{10}=21
Whakahekea te hautanga \frac{30}{100} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 10.
x=21+\frac{3}{10}
Me tāpiri te \frac{3}{10} ki ngā taha e rua.
x=\frac{210}{10}+\frac{3}{10}
Me tahuri te 21 ki te hautau \frac{210}{10}.
x=\frac{210+3}{10}
Tā te mea he rite te tauraro o \frac{210}{10} me \frac{3}{10}, me tāpiri rāua mā te tāpiri i ō raua taurunga.
x=\frac{213}{10}
Tāpirihia te 210 ki te 3, ka 213.
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