2(x-12)-3(4x-7)=9解答
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2(x-12)-3(4x-7)=9解答
2(x-12)-3(4x-7)=9解答
2(x-12)-3(4x-7)=9解答
2(x-12)-3(4x-7)=9
2x-24-12x+21=9
10x=-12
x=-1.2
2(x-12)-3(4x-7)=9
2x-24-12x+21=9
10x=-12
x=-1.2
-1.2
负五分之六
2(x-12)-3(4x-7)=9
2x-24-12x+21=9
10x=-12
x=-1.2
2(x-12)-3(4x-7)=9 解2x-24-12x+21=9 2x-12x-24+21 =9
-10x-3 =9
-10x =9+3
-10x=12
...
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2(x-12)-3(4x-7)=9 解2x-24-12x+21=9 2x-12x-24+21 =9
-10x-3 =9
-10x =9+3
-10x=12
x=12÷(-10)
x=12×负十分之一
x=负五分之六
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