(4x-2⁴).7³=2.7⁴
tìm x biết:
a) 6.x-5=743:741
b) 70-5.(x-3)=45
c) (3.x+24) .73=2.74
d) 4x - 40=|-8|
a, x = 9
b, x = 8
c, x = -2/3
d, x = 12
Nếu bạn cần giải chi tiết thì nhắn tin cho mi'k
Bài 2. Tìm x biết:
a, 128 - 3(x + 4) = 23 d, 720 : [41 - (2x - 5)] = 2 3 .5
b, [(4x + 28).3 + 55] : 5 = 35 e, 123 – 5.( x + 4 ) = 38
c, (12x - 4 3 ).8 3 = 4.8 4 g, ( 3x – 2 4 ) .7 3 = 2.7 4
a,
128-3x-12=23
3x=128-12-23
3x=93
x=93:3
= 31
b,
(12x+84+55):5=35
12x+84+55=35.5
12x+84+55=175
12x=175-55-84
12x=36
x=36:12
x=3
e, (3x–2⁴).7³=2.7⁴
( 3x - 24). 73 = 2.74
3x - 24 = 2.74 : 73
3x - 16 = 2.7
3x - 16 = 14
3x = 14 + 16
3x = 30
x = 30 : 3
x = 10
tìm x : x.(1/5+1/4) - ( 1/7+1/8 ) = 0
b 5^2.7^3.11^2+5^2.7^2.11 = 0
(3x-2⁴).7³=2.7⁴
\(\left(3x-2^4\right).7^3=2.7^4\)
\(\Leftrightarrow3x-2^4=2.7^4\div7^3\)
\(\Leftrightarrow3x-2^4=2.7\)
\(\Leftrightarrow3x-16=14\)
\(\Leftrightarrow3x=14+16\)
\(\Leftrightarrow3x=30\)
\(\Leftrightarrow x=10\)
\(\left(3x-2^4\right).7^3=2.7^4\)
\(3x-2^4=2.7^4:7^3\)
\(3x-16=14\)
\(3x=30\)
\(x=10\)
A=59/10:3/2-(7/3.9/2-2.7/3)7/3
59/10/3/2-(7/3.)^7/37/3
= -2.40912496859
k nha
(3x - 2^4).7^5=2.7^6
\(\left(3x-2^4\right).7^5=2.7^6\\ \Rightarrow3x-16=2.7^6:7^5\\ \Rightarrow3x-16=2.7\\ \Rightarrow3x-16=14\\ \Rightarrow3x=30\\ \Rightarrow x=10\)
(3x - 2^4) - 7^3 = 2.7^4
\(\Leftrightarrow3x-16=2.7^4+7^3=5145\Leftrightarrow3x=5161\Leftrightarrow x=\dfrac{5161}{3}\)
\(\left(3x-2^4\right)-7^3=2.7^4\\ \Leftrightarrow\left(3x-16\right)=2.7^4+7^3\\ \Leftrightarrow3x-16=5145\\ \Leftrightarrow3x=5145+16=5161\\ \Leftrightarrow x=\dfrac{5161}{3}\)
Tìm x biết
219-7 ( x+1 ) = 10²
( 3x - 2⁴ ) . 7³ = 2.7⁴
219 - 7(x + 1) = 10²
7(x + 1) = 219 - 10²
7(x + 1) = 219 - 100
7(x + 1) = 119
x + 1 = 119 : 7
x + 1 = 17
x = 17 - 1
x = 16
--------------------
(3x - 2⁴) . 7³ = 2.7⁴
(3x - 16).7³ = 2.7⁴
3x - 16 = 2.7⁴:7³
3x - 16 = 2.7
3x - 16 = 14
3x = 14 + 16
3x = 30
x = 30 : 3
x = 10