7-3=()+3=()-5=()-4=() 7（x-3）＝3（x+5）+4
6-\uff08\uff09+3\uff1d7 \uff08\uff09+2-4\uff1d6 5+3-\uff08\uff09\uff1d6\u50cf\u8fd9\u79cd\u9898\u6211\u4eec\u5e94\u8be5\u600e\u4e48\u6559\u5c0f\u5b69\uff0c\u6709\u4ec0\u4e48\u53e3\u8bc0\u5417\uff1f\u8fd9\u4e00\u7c7b\u9898\u76ee\u662f\u6ca1\u6709\u53e3\u8bc0\u7684\uff0c\u4e3b\u8981\u662f\u901a\u8fc7\u7ec3\u4e60\u660e\u767d\u4ea4\u6362\u5f8b\u3001\u7ed3\u5408\u5f8b\u3002\u6bd4\u5982\u7b2c\u4e00\u9898\uff0c6-2+3=7\uff0c\u5148\u6c42\u51fa6+3=9\uff0c\u7136\u540e9-\uff08\uff09=7\u5c31\u597d\u8003\u8651\u4e86\u3002
7(x-3)=3(x+5)+4
7x-21=3x+15+4
7x-21=3x+19
7x-3x=19+21
4x=40
x=10
7-3=4
=（1）+3
=（9）-5
=（8）-4
=（4）
7-3=(1)+3=(9)-5=(8)-4=(4)
7-3=(1)+3=(9)-5=(8)-4=(4)
绛旓細瑙ｏ細7-3=4 =锛1锛+3 =锛9锛-5 =锛8锛-4 =锛4锛
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绛旓細3²+7-5=11 3锛伱锛7-5锛夛紳12 3+7+5锛15 3脳7-5锛16 3锛伱7-5²=17 3锛+7+5锛18 锛3-7锛脳锛-5锛夛紳20
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绛旓細1銆3涓7鍗5 =-4+5 =1 2銆锛3鍗7锛梅5 =10梅5 =2 3銆-鈭氾紙-3+7锛+5 =-鈭4+5 =-2+5 =3 4銆3锛-7+5 =3脳2脳1-7+5 =6-7+5 =-1+5 =4 5銆3+7-5 =10-5 =5
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绛旓細5銆佺粨鏋滅瓑浜5锛3锛7锛5锛5銆6銆佺粨鏋滅瓑浜6锛3脳锛7锛5锛夛紳6銆7銆佺粨鏋滅瓑浜7锛7锛伱5锛伱3锛侊紳5040梅120梅6锛7銆8銆佺粨鏋滅瓑浜8锛3脳5锛7锛8銆9銆佺粨鏋滅瓑浜9锛7锛5锛3锛9銆10銆佺粨鏋滅瓑浜10锛3锛侊紜锛7锛5锛²锛6锛4锛10銆傚叾涓紝濡3锛佽〃绀虹殑鏄3鐨勯樁涔橈紝3锛锛3脳2脳1锛6銆
绛旓細梅3 (7²-5²)=8 3鐨勯樁涔樺姞7鍑5 =3*2*1+7-5 =6+7-5 =8 渚嬪:3-7+5=1,锛3+7锛梅5=2,-锛3²-7锛+5=3,锛3³-7锛壝5=4,3+7-5=5,3脳锛7-5锛=6,3²-7+5=7,-锛3³-7脳5锛=8,-3+7+5=9,锛3²-7锛壝5=10 ...
绛旓細3-7+5锛3锛3-7锛-2锛-2+5鍙緱3銆傚凡鐭ュ乏鍙充袱杈归兘涓3锛屾墍浠ュ乏鍙充袱杈圭浉绛夈1銆佺粨鏋滅瓑浜1锛3锛7锛5锛1銆2銆佺粨鏋滅瓑浜2锛锛3锛7锛梅5锛2銆3銆佺粨鏋滅瓑浜3锛3锛伱锛7锛5锛夛紳6梅2锛3銆4銆佺粨鏋滅瓑浜4锛氾紙7锛5锛壝3锛4銆5銆佺粨鏋滅瓑浜5锛3锛7锛5锛5銆6銆佺粨鏋滅瓑浜6锛3脳锛7锛5锛夛紳6銆7...
