Whakaoti mō x
x=-\frac{13y}{15}-\frac{17}{3}
Whakaoti mō y
y=\frac{-15x-85}{13}
Graph
Tohaina
Kua tāruatia ki te papatopenga
7y-15x-20y=85
Whakamahia te āhuatanga tohatoha hei whakarea te -5 ki te 3x+4y.
-13y-15x=85
Pahekotia te 7y me -20y, ka -13y.
-15x=85+13y
Me tāpiri te 13y ki ngā taha e rua.
-15x=13y+85
He hanga arowhānui tō te whārite.
\frac{-15x}{-15}=\frac{13y+85}{-15}
Whakawehea ngā taha e rua ki te -15.
x=\frac{13y+85}{-15}
Mā te whakawehe ki te -15 ka wetekia te whakareanga ki te -15.
x=-\frac{13y}{15}-\frac{17}{3}
Whakawehe 85+13y ki te -15.
7y-15x-20y=85
Whakamahia te āhuatanga tohatoha hei whakarea te -5 ki te 3x+4y.
-13y-15x=85
Pahekotia te 7y me -20y, ka -13y.
-13y=85+15x
Me tāpiri te 15x ki ngā taha e rua.
-13y=15x+85
He hanga arowhānui tō te whārite.
\frac{-13y}{-13}=\frac{15x+85}{-13}
Whakawehea ngā taha e rua ki te -13.
y=\frac{15x+85}{-13}
Mā te whakawehe ki te -13 ka wetekia te whakareanga ki te -13.
y=\frac{-15x-85}{13}
Whakawehe 85+15x ki te -13.
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