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219-7x(x-1)=100
⇒ 7x(x-1)=219-100
⇒ 7x(x-1)=119
⇒ x-1=119:7
⇒ x-1=17
⇒ x=17+1
⇒ x=18
219-7(x+1)=100
7(x+1)=219-100
7(x+1)=119
x+1=119:7
x+1=17
x=17-1
x=16
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
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(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
Lời giải:
$10+2x=4^5:4^3=4^2=16$
$2x=16-10=6$
$x=6:2=3$
---------
$2x-6^2:18=3.2^2$
$2x-2=12$
$2x=14$
$x=14:2=7$
--------------
$70-5(x-3)=3.2^5=96$
$5(x-3)=70-3.2^5=-26$
$x-3=\frac{-26}{5}$
$x=3+\frac{-26}{5}=\frac{-11}{5}$
------------------
$19-7(x+1)=10^2=100$
$7(x+1)=19-100=-81$
$x+1=\frac{-81}{7}$
$x=\frac{-81}{7}-1=\frac{-88}{7}$
------------
$(3x-2^4).7^3=2.7^4$
$3x-16=2.7^4:7^3=2.7=14$
$3x=14+16=30$
$x=30:3=10$
219-7.(x+1)=100
=> 7.(x+1)=219-100
=> 7.(x+1)=119
=> x+1=119:7
=> x+1=17
=> x=17-1
=> x=16
219-7.(x+1)=100
=>7.(x+1)=219-100=119
=>x+1=119:7
=>x+1=17
=>x=17-1=>x=16
Tick nhé
219 - 7 (x + 1) = 100
7 (x + 1 ) = 219 - 100
7 ( x + 1 ) = 119
x + 1 = 119 : 7
x + 1 = 17
x = 17 - 1
x = 16
=> x = 16
\(219-7\left(x+1\right)=100\)
\(7\left(x+1\right)=219-100\)
\(7\left(x+1\right)=119\)
\(x+1=119:7\)
\(x+1=17\)
\(x=17-1\)
\(x=6\)
Học Tốt !
219-7(x+1)=100
212(x+1)=100
x+1=100:212
x+1=2,12
x=2,12-1
x=1,12
Câu hỏi tương tự Đọc thêm219 - 7( x + 1 ) = 100
7 ( x + 1 ) = 219 - 100 = 119
x + 1 = 119 : 7 = 17
x = 17 - 1
x = 16
Vậy x = 16.
219 +7.x+1=100
⇔7x=100-219-1
⇔7x=-120
⇔x=\(\frac{-120}{7}\)
219 +7 . x + 1 = 100
(219 + 1) + 7. x = 100
220 + 7. x = 100
7 . x = 100 - 220
7 . x = -120
x = (-120) : 7
x = \(\frac{-120}{7}\)
219-7.(x+1)=100
=> 7.(x+1)=219-100
=> 7.(x+1)=119
=> x+1=17
=> x=16
219 - 7 (x+1) = 100
7 (x+1) = 219 - 100
7 (x+1) = 119
x+1 = 119 : 7
x+1 = 17
x = 17 -1
x = 16
tik mik nha!
219 - 7 . (x + 1) = 100
\(\Rightarrow\) 7 . (x + 1) = 219 - 100
\(\Rightarrow\) 7 . (x + 1) = 119
\(\Rightarrow\) x + 1 = 119 : 7
\(\Rightarrow\) x + 1 = 17 \(\Rightarrow\) x = 17 - 1 \(\Rightarrow\) x = 16 Vậy: x = 16\(219-7.\left(x+1\right)=100\)
\(7.\left(x+1\right)=219-100\)
\(7.\left(x+1\right)=119\)
\(\left(x+1\right)=119:7\)
\(\left(x+1\right)=17\)
\(x=17-1\)
\(x=16\)
Vậy \(x=16\)