Question

(x+0.5)-(x-1)/3=3 问x是多少？

Answer 1

解：（x+0.5)-(x-1)/3=3
x+0.5-x/3+1/3=3
2x/3+5/6=3
2x/3=3-5/6
2x/3=13/6
x=13/6÷(2/3)
x=13/6×3/2
x=13/4

Answer 2

Y=X（3—3X）=3(X-X^2)=3[-(X-1/2)^2+1/4] 当x=1/2时函数的最大值为3/4 如果还有什么不明白的可以在线问我 y=3x-3x*x 求导

Answer 3

(x+0.5)=3+(x-1)/3;
通分：3x+1.5=9+x-1
3x-x=9-1-1.5
2x=6.5
x=3.25

Answer 4

(x+0.5)-(x-1)/3=3
3(x+0.5)-(x-1)=9
3x+1.5-x+1=9
2x=6.5
x=3.25

Answer 5

x=3.25