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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
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Lời giải:
$10+2x=4^5:4^3=4^2=16$
$2x=16-10=6$
$x=6:2=3$
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$2x-6^2:18=3.2^2$
$2x-2=12$
$2x=14$
$x=14:2=7$
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$70-5(x-3)=3.2^5=96$
$5(x-3)=70-3.2^5=-26$
$x-3=\frac{-26}{5}$
$x=3+\frac{-26}{5}=\frac{-11}{5}$
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$19-7(x+1)=10^2=100$
$7(x+1)=19-100=-81$
$x+1=\frac{-81}{7}$
$x=\frac{-81}{7}-1=\frac{-88}{7}$
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$(3x-2^4).7^3=2.7^4$
$3x-16=2.7^4:7^3=2.7=14$
$3x=14+16=30$
$x=30:3=10$
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\(219-7\left(x+1\right)=100\)
\(=>219-7x-7=100\)
\(=>-7x+212=100\)
\(=>-7x=-112\)
\(=>x=16\)
Ai T mik nói vs mik mik sẽ T lại
Thanks nha
\(219-7\left(x+1\right)=100\)
\(\Leftrightarrow219-7x-7=100\)
\(\Leftrightarrow-7x=100-219+7\)
\(\Leftrightarrow-7x=-112\Leftrightarrow x=16\)
(k cho mình với nhé!)
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219 - 7 . ( x + 1 ) = 1000
Đề sai rồi bạn ơi
Học kì 2 mới học số âm nên đề này sai
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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
![](https://rs.olm.vn/images/avt/0.png?1311)
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
\(219-7\left(x+1\right)=100\)
\(\Rightarrow7\left(x+1\right)=119\)
\(\Rightarrow x+1=17\)
\(\Rightarrow x=16\)
Vậy \(x=16\)
1a, 4
2, 281+129+219=629
1)4
2)629