3.2
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鏁欏鐩爣
1.
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鐨勪紭瓒?
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.
2.
鎺屾彙鍚堝苟鍚岀被椤硅В
鈥?/p>
ax+bx=c
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骞跺垽
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.
3.
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鐨勫崗浣滄剰璇嗐�?/p>
閲嶇偣锛?/p>
1
寤虹珛鍒楁柟绋嬭В鍐冲疄
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2.
瀛︿細鍚堝苟鍚岀被椤癸紝浼氳В鈥?/p>
ax+bx=c
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闅剧偣锛?/p>
1.
鍒嗘瀽瀹為檯闂涓殑宸茬煡閲忓拰鏈煡閲忥紝鎵惧嚭鐩哥瓑鍏崇郴锛屽垪鍑烘柟绋嬨�?/p>
2.
浣垮鐢熼�愭寤虹珛鍒?/p>
鏂圭▼瑙ｅ喅瀹為檯闂鐨勬�濇兂鏂规硶
浣跨敤璇存槑锛?/p>
1.
闃呰璇炬湰
P88
鈥斺�?/p>
89
2.
闄愭椂
20
鍒嗛挓瀹屾垚鏈瀛︽銆傜劧鍚庡皬缁勮璁恒�?/p>
涓�銆佸瀛?/p>
涔︿腑
88
椤甸棶棰?/p>
1
锛?/p>
锛?/p>
1
锛夊浣曞垪鏂圭▼锛熷垎鍝簺姝ラ锛?/p>
璁炬湭鐭ユ暟
锛氳鍓嶅勾璐拱璁＄畻鏈?/p>
x
鍙?/p>
鍒欏幓骞?/p>
璐拱璁＄畻鏈?/p>
_____
鍙帮紝浠婂勾璐拱璁＄畻鏈?/p>
______
鍙?/p>
.
鎵剧浉绛夊叧绯?/p>
:_________________________ ____________
鍒楁柟绋?/p>
锛?/p>
___________________________________________________
(2)
鎬庢牱瑙ｈ繖涓柟绋嬶紵
x+2x
+4x=140
鍚堝苟鍚岀被椤癸紝寰?/p>
_____x=140
绯绘暟鍖栦负
1
锛屽緱
x=_____
锛?/p>
3
锛夋湰棰樿繕鏈変笉鍚岀殑鏈煡鏁扮殑璁炬硶鍚楋紵璇曡瘯鐪?/p>
涓�銆?/p>
鍚堜綔鎺㈢┒
1
銆?/p>
瑙ｆ柟绋?/p>
7x-2.5x+3x-1.5
x=-15
脳
4-6
脳
3
2
銆?/p>
缁冧範锛氳В涓?/p>
鍒楁柟绋嬶細