Whakaoti mō x
x=-2
Graph
Tohaina
Kua tāruatia ki te papatopenga
5x-15+2\left(x+1\right)=3\left(x-7\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 5 ki te x-3.
5x-15+2x+2=3\left(x-7\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 2 ki te x+1.
7x-15+2=3\left(x-7\right)
Pahekotia te 5x me 2x, ka 7x.
7x-13=3\left(x-7\right)
Tāpirihia te -15 ki te 2, ka -13.
7x-13=3x-21
Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te x-7.
7x-13-3x=-21
Tangohia te 3x mai i ngā taha e rua.
4x-13=-21
Pahekotia te 7x me -3x, ka 4x.
4x=-21+13
Me tāpiri te 13 ki ngā taha e rua.
4x=-8
Tāpirihia te -21 ki te 13, ka -8.
x=\frac{-8}{4}
Whakawehea ngā taha e rua ki te 4.
x=-2
Whakawehea te -8 ki te 4, kia riro ko -2.
Ngā Tauira
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