Whakaoti mō x
x=\frac{5}{7}\approx 0.714285714
Graph
Tohaina
Kua tāruatia ki te papatopenga
30\left(x-1\right)-20\left(x-2\right)-15\left(x-3\right)=-12\left(x-5\right)
Me whakarea ngā taha e rua o te whārite ki te 60, arā, te tauraro pātahi he tino iti rawa te kitea o 2,3,4,5.
30x-30-20\left(x-2\right)-15\left(x-3\right)=-12\left(x-5\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 30 ki te x-1.
30x-30-20x+40-15\left(x-3\right)=-12\left(x-5\right)
Whakamahia te āhuatanga tohatoha hei whakarea te -20 ki te x-2.
10x-30+40-15\left(x-3\right)=-12\left(x-5\right)
Pahekotia te 30x me -20x, ka 10x.
10x+10-15\left(x-3\right)=-12\left(x-5\right)
Tāpirihia te -30 ki te 40, ka 10.
10x+10-15x+45=-12\left(x-5\right)
Whakamahia te āhuatanga tohatoha hei whakarea te -15 ki te x-3.
-5x+10+45=-12\left(x-5\right)
Pahekotia te 10x me -15x, ka -5x.
-5x+55=-12\left(x-5\right)
Tāpirihia te 10 ki te 45, ka 55.
-5x+55=-12x+60
Whakamahia te āhuatanga tohatoha hei whakarea te -12 ki te x-5.
-5x+55+12x=60
Me tāpiri te 12x ki ngā taha e rua.
7x+55=60
Pahekotia te -5x me 12x, ka 7x.
7x=60-55
Tangohia te 55 mai i ngā taha e rua.
7x=5
Tangohia te 55 i te 60, ka 5.
x=\frac{5}{7}
Whakawehea ngā taha e rua ki te 7.
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