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\(\left(x-5\right).\frac{30}{100}=\frac{20x}{100}+5\)
\(\Leftrightarrow\left(x-5\right).0,3=0,2.x+5\)
\(\Leftrightarrow0,3.x-1,5=0,2.x+5\)
\(\Leftrightarrow0,3.x-0,2.x=5+1,5\)
\(\Leftrightarrow0,1.x=6,5\)
\(\Leftrightarrow x=65\)
\(\frac{\left(x-5\right).30}{100}=\frac{20x}{100}+\frac{500}{100}\)
\(\frac{30x-150}{100}=\frac{20x+500}{100}\)
=> 30x - 150 = 20x + 500
30x - 20x = 500 + 150
10x = 650
x = 65
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a) -12.(x-5)+7.(3-x)=5
-12.x + 60 + 21 - 7.x = 5
( -12.x -7.x ) + ( 60 + 21 ) = 5
-19.x + 81 = 5
-19.x = 5 - 81
-19.x = -76
x = -76 : (-19)
x = 4
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\(\left(27+x\right):2+10=380+200\times5\)
\(\left(27+x\right):2+10=380+1000\)
\(\left(27+x\right):2+10=1380\)
\(\left(27+x\right):2=1380-10\)
\(\left(27+x\right):2=1370\)
\(27+x=1370\times2\)
\(27+x=2740\)
\(x=2740-27\)
\(x=2713\)
`#3107.101107`
\(( 27 + x ) \div 2 + 10 = 380 + 200\times 5\\ (27 +x) \div 2 + 10 = 380 + 1000 \\ (27 + x) \div 2 + 10 = 1380 \\(27 + x) \div 2= 1380 - 10 \\ (27 + x) \div 2 = 1370 \\ 27 + x = 1370\times 2 \\ 27 + x = 2740 \\ x = 2740 - 27 \\ x = 2713 \)
Vậy, `x = 2713.`
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\(1) 420+65.4=(x+175):5+30\)
\(\implies 420+260=(x+175):5+30\)
\(\implies 680=(x+175):5+30\)
\(\implies 650=(x+175):5\)
\(\implies 650.5-175=x\)
\(\implies 3075=x\)
\(2)x-4867=(175.2050.70):25+23\)
\(\implies x-4867=1004500+23\)
\(\implies x-4867=1004523\)
\(\implies x=1009390\)
\(3) 134-[(96-7x):4-2]=126\)
\(\implies (96-7x):4-2=8\)
\(\implies(96-7x):4=10\)
\(\implies 96-7x=40\)
\(\implies 7x=56\)
\(\implies x=8\)
\(4) 4-\{100-[(100-5x):8-5]:10\}:25=0\)
\(\implies 4-\{100-[(100-5x):8-5]:10\}=0\)
\(\implies 100-[(100-5x):8-5]:10=4\)
\(\implies 100-[(100-5x):8-5]=40\)
\(\implies (100-5x):8-5=60\)
\(\implies (100-5x):8=65\)
\(\implies 100-5x=520\)
\(\implies 5x=-420\)
\(\implies x=-84\)
~ Hok tốt a~
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sao chả có ai giải bài hộ bạn thế bạn giải giúp mik với đang cần gấp
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100 x 2 + 100 x 3 + 100 x5 = 100 x 10 = 1000
Admin la quan li cua OLM ( chac the )
(x-5) x \(\frac{30}{100}\)= 200x : 100 + 5
(x-5) x \(\frac{3}{10}\)= 200x : 100 + 5
\(\frac{x.3-15}{10}\)= 2x + 5
\(\frac{x.3-15}{10}-2x=5\)
\(\frac{x.3-15}{10}-\frac{20x}{10}=5\)
\(\frac{3x-15-20x}{10}=5\)
3x - 20x - 15 = 50
-17x - 15 = 50
-17x = 65
x = 65 : -17
x = \(\frac{-65}{17}\)