Whakaoti mō x
x\leq \frac{80}{7}
Graph
Tohaina
Kua tāruatia ki te papatopenga
12x-5\left(x-4\right)\leq 100
Me whakarea ngā taha e rua o te whārite ki te 20, arā, te tauraro pātahi he tino iti rawa te kitea o 5,4. I te mea he tōrunga te 20, kāore e huri te ahunga koreōrite.
12x-5x+20\leq 100
Whakamahia te āhuatanga tohatoha hei whakarea te -5 ki te x-4.
7x+20\leq 100
Pahekotia te 12x me -5x, ka 7x.
7x\leq 100-20
Tangohia te 20 mai i ngā taha e rua.
7x\leq 80
Tangohia te 20 i te 100, ka 80.
x\leq \frac{80}{7}
Whakawehea ngā taha e rua ki te 7. I te mea he tōrunga te 7, kāore e huri te ahunga koreōrite.
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