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124 x 52 - 124 x 42
=124x(52-42)
=124x10
=1240
\(\left(x+268\right).137=48498\)
\(\Leftrightarrow x+268=48498:137\)
\(\Leftrightarrow x+268=354\)
\(\Leftrightarrow x=354-268\)
\(\Leftrightarrow x=86\)
b) \(\left(x+3217\right):215=348\)
\(\Leftrightarrow x+3217=348.215\)
\(\Leftrightarrow x+3217=74820\)
\(\Leftrightarrow x=74820-3217\)
\(\Leftrightarrow x=71603\)
c) \(\left(x-2048\right):145=246\)
\(\Leftrightarrow x-2048=246.145\)
\(\Leftrightarrow x-2048=35670\)
\(\Leftrightarrow x=35670+2048\)
\(\Leftrightarrow x=37718\)
d) \(\left(2043-x\right).84=132552\)
\(\Leftrightarrow2043-x=132552:84\)
\(\Leftrightarrow2043-x=1578\)
\(\Leftrightarrow x=2043-1578\)
\(\Leftrightarrow x=465\)
e) \(x.124+5276=48304\)
\(\Leftrightarrow x.124=48304-5275\)
\(\Leftrightarrow x.124=43028\)
\(\Leftrightarrow x=43028:124\)
\(\Leftrightarrow x=347\)
\(\Leftrightarrow2043-x=1578\)
a) ( x + 268 ) x 137 = 48498
( x + 268 ) = 48498
x + 268 = 354
x = 354 - 268
x = 86
a) \(124+\left(118+x\right)=217\)
\(118+x=217-124\)
\(118+x=93\)
\(x=-25\)
vay \(x=-25\)
b) \(\left[\left(6x-72\right):2-84\right].28=5628\)
\(\left(6x-72\right):2-84=5628:28\)
\(\left(6x-72\right):2-84=201\)
\(\left(6x-72\right):2=201+84\)
\(\left(6x-72\right):2=285\)
\(6x-72=285.2\)
\(6x-72=570\)
\(6x=642\)
\(x=107\)
vay \(x-107\)
c) \(71.2-\left(2x+5\right).6=100\)
\(142-\left(2x+5\right).6=100\)
\(\left(2x+5\right).6=142-100\)
\(\left(2x+5\right).6=42\)
\(2x+5=7\)
\(2x=2\)
\(x=1\)
vay \(x=1\)
a. x-32.45 = 0
=> x - 32 = 0 : 45
=> x - 32 = 0
=> x = 0 + 32
=> x = 33
Vậy x = 32
b. 2448 : [119 - (x - 6)] câu này hình như sai đề hay sao đấy bạn
c. 25.( 52 - x) = 25
=> 52 - x = 25 : 25
=> 52 - x = 1
=> x = 52 - 1
=> x = 51
Vậy x = 51
d. x - 84 : 42 = 21
=> x - 84 = 21.42
=> x - 84 = 882
=> x = 882 + 84
=> x = 966
Vậy x = 966
k mình nha, thks ^^
x : 84 = 124 42 x \(x\)= 1890
x = 124 x 84 x = 1890 : 42
x = 10.416 x = 45
x : 84 = 124
=> x = 124 x 84 = 10416
42 . x = 1890
=> x = 1890 : 42 = 45