Whakaoti mō x
x=-\frac{10}{13}\approx -0.769230769
Graph
Tohaina
Kua tāruatia ki te papatopenga
21x=2\left(4x-5\right)
Me whakarea ngā taha e rua o te whārite ki te 14, arā, te tauraro pātahi he tino iti rawa te kitea o 2,7.
21x=8x-10
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te 4x-5.
21x-8x=-10
Tangohia te 8x mai i ngā taha e rua.
13x=-10
Pahekotia te 21x me -8x, ka 13x.
x=\frac{-10}{13}
Whakawehea ngā taha e rua ki te 13.
x=-\frac{10}{13}
Ka taea te hautanga \frac{-10}{13} te tuhi anō ko -\frac{10}{13} mā te tango i te tohu tōraro.
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