两道解方程，要过程 两道解方程，求过程
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如图
3x/7+1/8=1/2
解：3x/7=1/2-1/8
3x/7=3/8
x=7/8
4x-1.6x=36
解：2.4x=36
x=15
图
绛旓細鍥炵瓟锛歮/3-n/4=-1 (1) m/2+n/3=7 (2) 涓や釜鏂圭▼涓よ竟涔樹互12 4m-3n=-12 6m+4n=84 16m-12n=-48 18m+12n=252 34m=204 m=6 n=12
绛旓細鏂规硶濡備笅锛岃浣滃弬鑰冿細
绛旓細涓ら亾瑙ｆ柟绋棰 鎬ワ紒 锛1锛 2x+3锛4-x锛= -1锛1-x锛 鍘绘嫭鍙峰緱:2x+12鈥3x=鈥1+x 绉婚」寰:2x涓3x鈥攛=鈥1鈥12 鍚堝苟鍚岀被寰:鈥2x=鈥13 涓よ竟閮介櫎浠モ2寰:x=6.5 锛2锛墄+3鍒嗕箣 x-1=2-4鍒嗕箣 1+x 鍘诲垎姣嶅緱:12x+4x涓12=24鈥3+12x 绉婚」寰:12x+4x涓12x=24鈥3+...
绛旓細鍥炵瓟锛歺鍗亁/5=480 x(1+1/5)=480 6/5x=480 x=400
绛旓細杩欎釜宸茬粡寰堣缁嗕簡
绛旓細(1锛 4X+7=2X-5 瑙 绉婚」锛 4X-2X=-5-7 鍚堝苟鍚岀被椤癸細 2X=-12 鍖栫郴鏁颁负1锛 X=-6 (2) 8X-7=7X-3 瑙 绉婚」锛 8X-7X=-3+7 鍚堝苟鍚岀被椤癸細 X=4 鍖栫郴鏁颁负1锛 X=4 (3) 1.1-4X=2.2-3X 瑙 绉婚」锛 3X-4X=2.2-1.1 鍚堝苟鍚岀被椤癸細 -X=...
绛旓細锛1锛夌涓姝ュ幓鎷彿锛4x-12=12+2x銆傜浜姝ョЩ椤硅繍绠楋細2x=24銆傝Вx=12銆傦紙2锛夌涓姝ュ幓鎷彿锛4x+4=5+2x+4 绗簩閮ㄧЩ椤硅繍绠楋細2x=5 瑙=2.5
绛旓細2銆佽x+y=a锛寈-y=b锛屽垯锛3a-4b=4 ===> b=(3/4)a-1 a/2+6/b=1 ===> (a/2)+6/[(3/4)a-1]=1 ===> a*[(3/4)a-1]+12=2*[(3/4)a-1]===> (3/4)a^2-a+12=(6/4)a-2 ===> (3/4)a^2-(10/4)a+14=0 ===> 3a^2-10a+56=0 鏃犺В锛侊紒锛3...
绛旓細鐪嬪浘鐗囷細缁忚繃楠岀畻锛屾槸姝ｇ‘鐨勫摝銆
绛旓細锛5/4锛/1.4=0.75/X绛夊紡涓よ竟浜ゅ弶鐩镐箻锛5X/4=0.75*1.4 X=1.05*4/5=0.84 2*(4X+5*0.7)=19 8X+7=19 8X=19-7=12 X=12/8=1.5 濡傛灉鏈鏈変粈涔堜笉鏄庣櫧鍙互杩介棶锛屽鏋滄弧鎰忚寰楅噰绾冲鏋滄湁鍏朵粬闂璇烽噰绾虫湰棰樺悗鍙﹀彂鐐瑰嚮鍚戞垜姹傚姪锛岀瓟棰樹笉鏄擄紝璇疯皡瑙ｏ紝璋㈣阿銆傜瀛︿範杩涙....
