\(\frac{173}{60}\)

ai tk mk mk tk lại

bạn viết rõ hơn phép tính đc ko

nhanh lên

bài này khó

1) x = 12,3  - 2,3 + 4,5 = 5,5

2) x = 24,4 - 19,44 = 4,96

3) x = 831,6

Nhớ bấm L I K E nhá :)) 

\(x\times9,6+x:2,5=45\\ x\times9,6+x\times0,4=45\\ x\times\left(9,6+0,4\right)=45\\ x\times10=45\\ x=45:10\\ x=4,5\)

tìm x nhá 

=>2x=5,8

hay x=2,9

x=2,9

\(\frac{2}{10}dm^2=20cm^2\)

chúc bn học gioi!

nhaE@@@

hihiLiv and Maddie

2/10 dm2 = ...20.... cm2

34 * 10 = 340

ĐÚNG GIÚP MK

34 x (5 + 5)

= 34 x 10

= 340

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

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

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

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

\(\implies 650.5-175=x\)

\(\implies 3075=x\)

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

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

\(\implies x-4867=1004523\)

\(\implies x=1009390\)

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

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

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

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

\(\implies 7x=56\)

\(\implies x=8\)

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

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

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

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

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

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

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

\(\implies 5x=-420\)

\(\implies x=-84\)

~ Hok tốt a~

ai nua cac ban