\{ 0.7 x - 0.3 y = 2
Whakaoti mō x
x=\frac{3y+20}{7}
Graph
Tohaina
Kua tāruatia ki te papatopenga
0.7x=2+0.3y
Me tāpiri te 0.3y ki ngā taha e rua.
0.7x=\frac{3y}{10}+2
He hanga arowhānui tō te whārite.
\frac{0.7x}{0.7}=\frac{\frac{3y}{10}+2}{0.7}
Whakawehea ngā taha e rua o te whārite ki te 0.7, he ōrite ki te whakarea i ngā taha e rua ki te tau huripoki o te hautanga.
x=\frac{\frac{3y}{10}+2}{0.7}
Mā te whakawehe ki te 0.7 ka wetekia te whakareanga ki te 0.7.
x=\frac{3y+20}{7}
Whakawehe 2+\frac{3y}{10} ki te 0.7 mā te whakarea 2+\frac{3y}{10} ki te tau huripoki o 0.7.
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