六年级下数学练习册P33页答案

\u516d\u5e74\u7ea7\u7b2c\u4e8c\u5b66\u671f\u6570\u5b66\u7ec3\u4e60\u518cP33\u9875\u7b54\u6848

\u89e3\uff1a\uff081\uff09-11x\uff1c18x+41\uff0c\u539f\u5f0f\u79fb\u9879\u5f97\uff1a-29x-41/29
(2)21y+6\uff089\u5206\u4e4b4y-24\uff09\uff1c\u7b49\u4e8e-1\uff0c\u5f0f\u5b50\u662f\u8fd9\u6837\u7684\u5417\uff1f21y+6(4y-24)/9\u2264-1\uff1f\uff0c\u82e5\u662f\u7684\u8bdd\uff1a\u539f\u5f0f\u5373\u4e3a\uff1a21y+2(4y-24)/3\u2264-1\uff0c\u4e0d\u7b49\u5f0f\u4e24\u8fb9\u540c\u4e583\u5f97\uff1a63y+2(4y-24)\u2264-3\uff0c\u5316\u7b80\u5f97\uff1a71y\u226445\u89e3\u5f97y\u226445/71
\u82e5\u662f\u8fd9\u6837\u7684\u8bdd\uff1a21y+6*
(3) 0.4x-11\uff1e2.4x-21\uff0c\u79fb\u5411\u5f97\uff1a10>2x\u89e3\u5f97x<5
(4)8\u5206\u4e4b3x+1\uff1c\u7b49\u4e8e8\u5206\u4e4b5x-4\u5206\u4e4b3,\u539f\u5f0f\u662f\u8fd9\u4e2a\u5417\uff1f3x/8+1\u22645x/8-3/4\uff0c\u82e5\u662f\u7684\u8bdd\uff1a\u4e0d\u7b49\u5f0f\u4e24\u8fb9\u540c\u4e588\u5f97\uff1a3x+8\u22645x-6\uff0c\u79fb\u5411\u5f97\uff1a14\u22642x\uff0c\u89e3\u5f97x\u22657
\uff085\uff095\uff083x-1\uff09\uff1e\u7b49\u4e8e28-2\uff086x-24\uff09\uff0c\u539f\u5f0f\uff1a5(3x-1)\u226528-2(6x-24\uff09\u5373\uff1a15x-5\u226528-12x+48\uff0c\u79fb\u5411\u5f97\uff1a27X\u226581\u89e3\u5f97x\u22653
\u82e5\u6709\u95ee\u9898\u7ee7\u7eed\u8ffd\u95ee\uff0c\u6709\u5e2e\u52a9\u8bf7\u91c7\u7eb3\uff01

(1)-11x-18x-41/29
(2)21y+6*(4y/9-24)\u2264-1 21y+8y/3-144\u2264-1 21y+8y/3\u2264143 63y+8y\u2264429 y\u2264429/71
(3)-2x>-10 x<5
(4)(3x+1)/8\u22645x/8-3/4 3x+1\u22645x-6 -2x\u2264-7 x\u22657/2
(5)15x-5\u226528-12x+48 27x\u226581 x\u22653

这是初一的解不等式，移项、合并、计算，注意正负号，如果除以或乘以负数的不等式要变号，看看书再做吧。

（1）.-11x18x+41
-11x-18x＜41
-29x＜41
x>-41/29

都是同理可证。。。

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