75 3,2x 50=500 150 2x=600 x=300 4,4x 1.5=3.9 4x=2.
3×括号x 3.9括号等于12.6这个方程怎么解
3(x 0.8)=3.9 用方程解,完整的.
9当x=3时,这两个函数的值相等
3(x 0.8)=3.9 用方程解,完整的.
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