a) x = 74    

b) x = 5 

c) x = 3      

d) x = 14

\(15\times\left(32-24\div x\right)-230=70\)

\(15\times\left(32-24\div x\right)=300\)

\(32-24\div x=20\)

\(24\div x=12\)

\(x=2\)

\(15\times\left(32-24:x\right)-230=70\)

\(15\times\left(32-24:x\right)=70+230\)

\(15\times\left(32-24:x\right)=300\)

\(32-24:x=300:15\)

\(32-24:x=20\)

\(24:x=32-20\)

\(24:x=12\)

\(x=24:12\)

\(x=2\)

\(#WendyDang\)

\(15\cdot\left(32-24:x\right)=300\)

\(32-24:x=300:15=20\)

\(24:x=32-20=12\)

\(x=24:12=2\)

a) \(\dfrac{24}{32}=\dfrac{15}{20};\dfrac{32}{24}=\dfrac{20}{15};\dfrac{15}{24}=\dfrac{20}{32};\dfrac{32}{24}=\dfrac{24}{15}\)

b) \(\dfrac{4,8}{25,6}=\dfrac{0,6}{3,2};\dfrac{25,6}{4,8}=\dfrac{3,2}{0,6};\dfrac{25,6}{3,2}=\dfrac{4,8}{0,6};\dfrac{3,2}{25,6}=\dfrac{0,6}{4,8}\)

a: \(\dfrac{24}{32}=\dfrac{15}{20};\dfrac{24}{15}=\dfrac{32}{20};\dfrac{32}{24}=\dfrac{20}{15};\dfrac{15}{24}=\dfrac{20}{32}\)

b: \(\dfrac{4.8}{25.6}=\dfrac{0.6}{3.2};\dfrac{4.8}{0.6}=\dfrac{25.6}{3.2};\dfrac{25.6}{4.8}=\dfrac{3.2}{0.6};\dfrac{0.6}{4.8}=\dfrac{3.2}{25.6}\)

a, 36:(x–5) =  2 2

(x–5) = 9

x = 14

b, [3.(70–x)+5]:2 = 46

[3.(70–x)+5] = 92

70–x = 29

x = 41

c, 450:[41–(2x–5)] =  3 2 .5

41–(2x–5) = 10

2x–5 = 31

2x = 36

x = 18

d, 230+[ 2 4 +(x–5)] = 315. 2018 0

16+(x–5) = 315–230

x–5 = 85–16

x = 69+5

x = 74

e,  2 x + 2 x + 1  = 48

2 x .(2+1) = 48

2 x = 16 =  2 4

x = 4

f,  3 x + 2 + 3 x  = 2430

3 x . 3 2 + 1 = 2430

3 x = 2430:10 = 243 =  3 5

x = 5

15,8 x 3,7 - 4,8 x 5,8 + 5,7 x 15,8 - 4,6 x 5,8

= 15,8 x (3,7 + 5,7) - 5,8 x (4,8 + 4,6)

= 15,8 x 9,4 - 5,8 x 9,4

= 9,4 x (15,8 - 5,8)

= 9,4 x 10

= 94

X/7=10/14 : X la 5

4/9=x/27 : x la 12

15/24=x/32: 15/24= 5/8: vậy X= 20

bằng 9,4

bạn ko nêu cách tính à

8,8 x 3,7 + 5,7 x 8,8 - 7,8 x 4,8 - 4,6 x 7,8

= 8,8 x ( 3,7 + 5,7 ) - 7,8 x ( 4,8 - 4,6 )

= 8,8 x 9,4 - 7,8 x 0,2

= 82,72 - 1,56

= 81,16

:)

Lời giải:
$=16,2\times (5,7+3,7)-6,2\times (4,8+4,8)$

$=16,2\times 9,4-6,2\times 9,6$

$=16,2\times 9,4-6,2\times 9,4-6,2\times 0,2$

$=9,4\times (16,2-6,2)-6,2\times 0,2$

$=9,4\times 10-1,24$

$=94-1,24=92,76$

18,2 x (5,7+3,7+4,8) - 37,72=

=18,2 x 14,2 - 37,72

=258,44 - 37,72

=220,72 

=22072

tích mik nha mấy bạn mik còn 2 điểm nữa thôi là 50 điểm uk

nhưng KQ phải ra 94