请学霸们帮忙解这个方程！谢谢！
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\u6839\u636e\u9898\u610f\u5f97
(8x+4) / 5= (11x+1)/7+1
\u89e3\u5f97x=12\uff0c
解 1.57x+x=128.5
2.57x=128.5
x=50
3.14x÷2x－2x＝128.5－2x
3.14x×3.14＝126.5×3.14
1.57x＋x＝128.5
绛旓細锛1-45%锛墄=220 瑙ｏ細 55%x=220 x=220梅55 x=400
绛旓細鍘熷紡绛変簬 [(x+2)(x-1)]²+[(2x-3)(x-1)]²-[(3x-1)(x-1)]²=0 (x-1)²[(x+2)²+(2x-3)²-(3x-1)²]=0 (x-1)²(x²+4x+4+4x²-12x+9-9x²+6x-1)=0 (x-1)²(-4x²-2x+12)=0 -...
绛旓細杩欎釜鐩存帴鐢ㄤ唬鍏ユ秷鍏冩硶鍗冲彲銆鏂圭▼1寰楋細x=鈭(1+y^2)/(1+1/鈭3)=鈭(1+y^2)*(3-鈭3)/2 浠ｅ叆鏂圭▼2锛1/12+y/4+(1+y^2)*(3-鈭3)/4=1/3+y/2 鍘诲垎姣嶏細1+3y+3(1+y^2)(3-鈭3)=4+6y (1+y^2)(3-鈭3)=1+y (3-鈭3)y^2-y+2-鈭3=0 鈻=1-4(3-鈭3)(2-鈭...
绛旓細x-75/100=1/3x x-179.25=1/3x x-1/3x=179.25 2/3x锛179.25 x=179.25梅2/3 x=鑷繁绠楀惂 鍚屽锛屽涓嶈捣锛屾垜涓嶇煡閬撳仛寰楀涓嶅锛屼絾鎴戞墠鍒氳涓婂垵涓紝閿欑殑鍑犵巼姣旇緝澶э紝璇蜂綘鐞嗚В涓涓嬶紝涔熻浣甯垜鐪嬬湅瀵逛笉瀵癸紝璋㈣阿
绛旓細(1)+(2)寰10X=16 x=1.6 (2)-(1)寰2y=2 鈭磞=1 鈭磠x=1.6,y=1
绛旓細鍋囪娉曘傚厛閫夊叕楦″拰灏忛浮銆傚鏋滈兘涔板叕楦★紝100鍙姳100脳5=500鍏冿紝澶氫簡500-100=400鍏 鍙堝洜涓烘瘡鍙皬楦℃瘮鍏浮渚垮疁5-1/3=14/3鍏冿紝鎵浠ヤ拱灏忛浮400梅锛14/3锛=600/7鍙傚叕楦100-600/7=100/7鍙傚張锛屼竴鍙瘝楦3鍏冿紝鎵浠ユ瘡澶氫拱涓鍙瘝楦″氨瑕佸皯涔板叕楦″拰灏忛浮鐨勬瘮渚嬫槸3-1/3锛5-3=4锛3锛屼篃灏辨槸灏戜拱...
绛旓細1銆瑙锛氳鍟嗗搧鐨勬爣浠蜂负x鍏.90锛厁=500脳锛1+15.2锛咃級0.9x=576 x=640 绛旓細鍟嗗搧鐨勬爣浠蜂负60鍏.2銆佽В锛氳鍞揣鍛樻渶浣庡彲浠ユ墦x鎶樺嚭鍞.3000x=2000锛1+5%锛3000x=2100 x=0.7 绛旓細鍞揣鍛樻渶浣庡彲浠ユ墦7鎶.
绛旓細鍥
绛旓細2bx+2cx-2bc-2b²=2x(b+c)-2b(c+b)=2(x-b)(b+c)bx+cx-ab-ac=x(b+c)-a(b+c)=(x-a)(b+c)涓婁笅绾﹀垎鍚庝负2(x-b)/(x-a)ax-cx-a²+ac=x(a-c)-a(a-c)=(x-a)(a-c)ax-cx-ab+bc=x(a-c)-b(a-c)=(x-b)(a-c)涓婁笅绾﹀垎鍚庝负(x-a)/(x-b)涓...
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