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1) 540 :x + 126 :x = 18
=> (540 + 126) : x = 18
=> 666 : x = 18
=> x = 666 : 18
=> x = 37
2) 4982 + x . 136 - 854 = 14328
=> 4128 + x . 136 = 14328
=> x . 136 = 14328 - 4128
=>x . 136 = 10200
=> x = 10200 : 136
=> x = 75
1.
540 : x + 126 : x = 18
x * (540 + 126)=18
x*666=18
x=1/37
\(x\times405=86265\)
\(x=86265:405\)
\(x\text{=}213\)
\(89658:x=293\)
\(x=89658:293\)
\(x\text{=}306\)
\(x+126=480\)
\(x=480-126\)
\(x=354\)
\(x-209\text{=}435\)
\(x\text{=}435+209\)
\(x\text{=}644\)
\(x:13=200+5\)
\(x:13\text{=}205\)
\(x\text{=}205\times13\)
\(x\text{=}2665\)
\(x\times40\text{=}26000-400\)
\(x\times40=25600\)
\(x\text{=}25600:40\)
\(x\text{=}640\)
\(962456-x=342\times7\)
\(962456-x=2394\)
\(x\text{=}962456-2394\)
\(x\text{=}960062\)
476 x 476 + 523 x 476 + 476 = 476 x ( 476 + 523 + 1 ) = 476 x 1000 = 476000
\(=476\times476+523\times476+1\times476\)
\(=\left(476+523+1\right)\times476\)
\(=1000\times476\)
\(=476000\)
a) 321475 + 423507 x 2
= 321475 + 847014 = 1168489
843275 - 123568 x 5
= 843275 - 617840 = 225435
b) 1306 x 8 + 24573
= 10448 + 24573 = 35021
609 x 9 - 4845
= 5481 - 4845 = 636
bài khó thế bạn
\(a,x-4702=9198\)
<=>\(x=9198+4702\)
<=>\(x=13900\)
\(b,485126+x=854609\)
<=>\(x=854609-485126\)
<=>\(x=369483\)
\(c,x+37206=108927\)
<=>\(x=108927-37206\)
<=>\(x=71721\)
\(d,780134-x=89476\)
<=>\(x=780134-89476\)
<=>\(x=690658\)