李老师和王老师带43名学生去植树,平均每植2棵,一共植多少棵? 老师和学生们一起开展植树话动。老师每人植2棵，学生每2人植1...
\u674e\u8001\u5e08\u5e2640\u540d\u5b66\u751f\u53bb\u690d\u6811,\u674e\u8001\u5e08\u4e00\u4eba\u690d\u4e94\u68f5,\u7537\u751f\u4e00\u4eba\u690d3\u68f5,\u5973\u751f\u4e00\u4eba\u690d2\u68f5,\u603b\u5171\u690d\u6811100\u68f5,\u95ee\u7537\u751f,\u5973\u751f\u5404\u6709\u591a100-5=95\uff08\u68f5\uff09
40x3=120\uff08\u68f5\uff09
120-95=25\uff08\u68f5\uff09
3-2=1\uff08\u68f5\uff09
\u5973\u751f\uff1a25\u00f71=25\uff08\u4eba\uff09
\u7537\u751f\uff1a40-25=15\uff08\u4eba\uff09
\u7b54\uff1a\u7537\u751f\u670915\u4eba\uff0c\u5973\u751f\u670925\u4eba\u3002 \u5982\u679c\u9700\u8981\u610f\u601d\u518d\u8ffd\u95ee\u3002
\uff081\uff09\u738b\u8001\u5e08\u548c4\u540d\u5b66\u751f\u4e00\u8d77\u690d\u6811\uff0c\u4ed6\u4eec\u4e00\u5171\u503c\u4e862X1+2=4\uff08\u68f5\uff09
\uff082\uff09\u8fd9\u6b21\u6d3b\u52a8\u4e00\u5171\u690d\u4e8619\u68f5\u6811\uff0c\u8bbe\u53c2\u4e0e\u7684\u8001\u5e08x\u4eba\uff0c\u5b66\u751f\u6709y\u4eba\u3002\u5219y/2+2x=19
\u52199\u4e2a\u8001\u5e08\uff0c2\u4e2a\u5b66\u751f\u30028\u4e2a\u8001\u5e08\uff0c6\u4e2a\u5b66\u751f\u30027\u4e2a\u8001\u5e08\uff0c10\u4e2a\u5b66\u751f\u30026\u4e2a\u8001\u5e08\uff0c14\u4e2a\u5b66\u751f\u30025\u4e2a\u8001\u5e08\uff0c18\u4e2a\u5b66\u751f\u30024\u4e2a\u8001\u5e08\uff0c22\u4e2a\u5b66\u751f\u30023\u4e2a\u8001\u5e08\uff0c26\u4e2a\u5b66\u751f\u30022\u4e2a\u8001\u5e08\uff0c30\u4e2a\u5b66\u751f\u30021\u4e2a\u8001\u5e08\uff0c34\u4e2a\u5b66\u751f\u3002\u4ee5\u6b64\u7c7b\u63a8\u5e76\u4fdd\u8bc1y\u59cb\u7ec8\u4e3a\u5076\u6570\u5373\u53ef\u3002
2×（43+2）=2×45
=90（棵）
答：一共植树90棵。
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