2x➕（x➗2➕8）等于48怎么解？ x✖️(x➕2)&...
\u5728\u7ebf\u89e3\u4e00\u9053\u5c0f\u5b66\u6570\u5b66\u9898\u3002\u8c22\u8c22\u5404\u4f4d\u89e3\uff1a\u6c99\u5806\u5e95\u9762\u534a\u5f84\uff1a12.56\u00f73.14\u00f72\uff1d2\u7c73
\u6c99\u5806\u4f53\u79ef\uff1a3.14\u00d72\u00d72\u00d71.8\u00d71/3\uff1d7.536\u7acb\u65b9\u7c73
3\u5398\u7c73\uff1d0.03\u7c73
\u80fd\u94fa\uff1a7.536\u00f7\uff088\u00d70.03\uff09\uff1d31.4\u7c73
\u89e3\uff1a\u5706\u67f1\u7684\u5e95\u9762\u534a\u5f84\u662f\uff1a41.12\u00f7\uff082+2+2\u00d73.14\uff09\uff1d4\u5398\u7c73
\u5e95\u9762\u76f4\u5f84\u548c\u9ad8\u90fd\u662f\uff1a4\u00d72\uff1d8\u5398\u7c73
\u8868\u9762\u79ef\u662f\uff1a3.14\u00d78\u00d78+3.14\u00d74\u00d74\u00d72\uff1d200.96+100.48\uff1d301.44\u5e73\u65b9\u5398\u7c73
x✖️(x+2)✖️(x+4)\u8fd9\u4e2a\u4e0d\u662f\u65b9\u7a0b\uff0c\u4e0d\u80fd\u89e3\u3002\u8fd9\u662f\u4e00\u4e2a\u4ee3\u6570\u5f0f\uff0c\u662f\u6574\u5f0f\u7684\u4e58\u6cd5\u3002
\u89e3\uff1a x✖️(x+2)✖️(x+4)
=x(x^2+6x+8)
=x^3+6x^2+8x\u3002
2x＋x/2＋8=48
5/2x=40
x=40×2/5=16
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