Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
18 x 76 + 18 x 23 + 18
= 18 x 76 + 18 x 23 + 18 x 1
= 18 x ( 76 + 23 + 1 )
= 18 x 100
= 1800
18 x 76 + 18 x 23 + 18
= 18 x ( 76 + 23 + 1)
= 18 x 100
= 1800
\(\left(8\times18-5\times18-3\times18\right)\times x+2\times x=8\times7+24\)
\(18\times\left(8-5-3\right)\times x+2\times x=8\times7+24\)
\(0\times x+2\times x=8\times7+24\)
\(\left(0+2\right)\times x=8\times7+24\)
\(2\times x=8\times7+24\)
\(2\times x=56+24\)
\(2\times x=80\)
\(x=80:2\)
\(x=40\)
18 * (x - 16) = 18
x - 16 = 18 : 18
x - 16 = 1
x = 1 + 16
x = 17
42 x 3 + 18 x 32 + 18 x 61
= 6 x 7 x 3 + 18 x 32 + 18 x 61
= 18 x 7 + 18 x 32 + 18 x 61
= 18 x (7 + 32 + 61)
= 18 x 100
= 1800
\(42\times3+18\times32+18\times61\)
\(=6\times7\times3+18\times32+18\times61\)
\(=18\times7+18\times32+18\times61\)
\(=18\times\left(7+32+61\right)\)
\(=18\times100\)
\(=1800\)
11 x 12 + 12 x 13 + 13 x 14 + 14 x 15 + 15 x 16 + 16 x 17 + 17 x 18 + 18 x 19 + 19 x 20 + 20 x 21
= 12 x ( 11 + 13 ) + 14 x ( 13 + 15 ) + 16 x ( 15 + 17 ) + 18 x ( 17 + 19 ) + 20 x 21
= 12 x 24 + 14 x 28 + 16 x 32 + 18 x 36 + 420
= 288 + 392 + 512 + 648 + 420
= ( 288 + 392 ) + ( 512 + 648 ) + 420
= 680 + 1160 + 420
= 1840 + 420
= 2260
tk nha
=
Ta có:
11 x 12 + 12 x 13 + 13 x 14 + 14 x 15 + 15 x 16 + 16 x 17 + 17 x 18 + 18 x 19 + 19 x 20 + 20 x 21
= 12 x ( 11 + 13 ) + 14 x ( 13 + 15 ) + 16 x ( 15 + 17 ) + 18 x ( 17 + 19 ) + 20 x 21
= 12 x 24 + 14 x 28 + 16 x 32 + 18 x 36 + 420
= 288 + 392 + 512 + 648 + 420
= ( 288 + 392 ) + ( 512 + 648 ) + 420
= 680 + 1160 + 420
= 1840 + 420
= 2260
#Mạt Mạt#
(8 x 18 - 5 x 18 - 18 x 3)x + 2x = 8 x 7 + 24
<=> [18 x (8 - 5 - 3)]x + 2x = 80
<=> 2x = 80
<=> x = 40,k nhé bạn
(8x18-5x18-18x3)xX+2xX=8x7+24
=>8x(8-5-3)xX+2xX=80
=>8x0xX+2xX=80
=>0+2xX=80
=>X=80:2
=>X=40
18 x y- y : 0,125 +y x 0,5 - 2 x y x 0,15 =18
18 x y - y x 8 + y x 0,5 - y x 0,3 =18
y x (18-8+0,5-0,3)=18
y x 10,2=18
y= \(\frac{30}{17}\)
\(18\times y-y:0,125+y\times0,5-2\times y\times0,15=18\)
\(\Rightarrow18\times y-y\times8+y\times\frac{5}{10}-2\times y\times0,15=18\)
\(\Rightarrow18\times y-y\times8+y\times\frac{1}{2}-2\times y\times\frac{15}{10}=18\)
\(\Rightarrow18\times y-y\times8+y\times2-2\times y\times\frac{3}{2}=18\)
Tự tìm nhé
18 . ( x - 16 ) = 18
x - 16 = 18 : 18
x - 16 = 1
x = 16 + 1
x = 17
200-18:(372:3:x-1)-28=166 tìm x
200-18:(372:3:x-1) = 166 + 28
200-18:(372:3:x-1) = 194
18:(372:3:x-1) = 200 – 194
18:(372:3:x-1) = 6
372:3:x-1 = 18 : 6
372:3:x-1 = 3
124 : x = 3+1
124 : x = 4
X = 124 : 4
X = 31
x : 18 = 24
x = 24 x 18
x = 432