\(\left(x-5\right).\frac{30}{100}=\frac{20x}{100}+5\)

\(\Leftrightarrow\left(x-5\right).0,3=0,2.x+5\)

\(\Leftrightarrow0,3.x-1,5=0,2.x+5\)

\(\Leftrightarrow0,3.x-0,2.x=5+1,5\)

\(\Leftrightarrow0,1.x=6,5\)

\(\Leftrightarrow x=65\)

\(\frac{\left(x-5\right).30}{100}=\frac{20x}{100}+\frac{500}{100}\)

\(\frac{30x-150}{100}=\frac{20x+500}{100}\)

=> 30x - 150 = 20x + 500

30x - 20x = 500 + 150

10x = 650

x = 65

VL, đây mà là toán lớp 5 á ??

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

\(\left(27+x\right):2+10=380+200\times5\)

\(\left(27+x\right):2+10=380+1000\)

\(\left(27+x\right):2+10=1380\)

\(\left(27+x\right):2=1380-10\)

\(\left(27+x\right):2=1370\)

\(27+x=1370\times2\)

\(27+x=2740\)

\(x=2740-27\)

\(x=2713\)

`#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.`

\(1) 420+65.4=(x+175):5+30\)

\(\implies 420+260=(x+175):5+30\)

\(\implies 680=(x+175):5+30\)

\(\implies 650=(x+175):5\)

\(\implies 650.5-175=x\)

\(\implies 3075=x\)

\(2)x-4867=(175.2050.70):25+23\)

\(\implies x-4867=1004500+23\)

\(\implies x-4867=1004523\)

\(\implies x=1009390\)

\(3) 134-[(96-7x):4-2]=126\)

\(\implies (96-7x):4-2=8\)

\(\implies(96-7x):4=10\)

\(\implies 96-7x=40\)

\(\implies 7x=56\)

\(\implies x=8\)

\(4) 4-\{100-[(100-5x):8-5]:10\}:25=0\)

\(\implies 4-\{100-[(100-5x):8-5]:10\}=0\)

\(\implies 100-[(100-5x):8-5]:10=4\)

\(\implies 100-[(100-5x):8-5]=40\)

\(\implies (100-5x):8-5=60\)

\(\implies (100-5x):8=65\)

\(\implies 100-5x=520\)

\(\implies 5x=-420\)

\(\implies x=-84\)

~ Hok tốt a~

ai nua cac ban

sao chả có ai giải bài hộ bạn thế bạn giải giúp mik với đang cần gấp

100 x 2 + 100 x 3 + 100 x5 = 100 x 10 = 1000

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