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x-(17-8) = 5+(10-3x)
x-9=5+10-3x
x+3x=5+10+9
x+3x=24
4x=24
x=24/4
x=6
vậy x=6
3 + (-2) +x =5
(-2) +x = 5-3
(-2) +x =2
x =2 - (-2)
x= 4
Vậy x = 4
tk nhé
a) x - (-3) + 5 = -8 c) |x| - 5 = 0
=> x + 3 + 5 = -8 => |x| = 5
=> x + 8 = -8 => \(\orbr{\begin{cases}x=5\\x=-5\end{cases}}\)
=> x = -8 - 8 Vậy ...
=> x = -16
b) 20 - (3 - x) = 2x - 4 d) |5 - x| + (-4) = 8
=> 20 - 3 + x = 2x - 4 => |5 - x| = 8 + 4
=> 17 + x = 2x - 4 => |5 - x| = 12
=> 17 + 4 = 2x - x => \(\orbr{\begin{cases}5-x=12\\5-x=-12\end{cases}}\)
=> x = 21 => \(\orbr{\begin{cases}x=-7\\x=17\end{cases}}\)
a) \(3x-10=2x+13\Leftrightarrow x=13+10=23\)
b) \(x+12=-5-x\Leftrightarrow2x=-17\Leftrightarrow x=-\frac{17}{2}\)
c) \(x+5=10-x\Leftrightarrow2x=5\Leftrightarrow x=\frac{5}{2}\)
d) \(6x+23=2x-12\Leftrightarrow4x=-35\Leftrightarrow x=-\frac{35}{4}\)
e) \(12-x=x+1\Leftrightarrow2x=11\Leftrightarrow x=\frac{11}{2}\)
f) \(14+4x=3x+20\Leftrightarrow x=20-14=6\)
g) \(2\left(x-1\right)+3\left(x-2\right)=x-4\Leftrightarrow2x-2+3x-6=x-4\)
\(\Leftrightarrow5x-8=x-4\Leftrightarrow4x=4\Leftrightarrow x=1\)
h ) \(3\left(4-x\right)-2\left(x-1\right)=x+20\Leftrightarrow12-3x-2x+2=x+20\)
\(\Leftrightarrow14-5x=x+20\Leftrightarrow6x=-6\Leftrightarrow x=-1\)
i ) \(4\left(2x+7\right)-3\left(3x-2\right)=24\Leftrightarrow8x+28-9x+6=24\)
\(\Leftrightarrow34-x=24\Leftrightarrow x=34-24=10\)
k) \(3\left(x-2\right)+2x=10\Leftrightarrow3x-6+2x=5x-6=10\)
\(\Leftrightarrow5x=10+6=16\Leftrightarrow x=\frac{16}{5}\)
Tự KL cho các phần
\(a,2-x=17-\left(-5\right)\)
\(\Rightarrow2-x=17+5\)
\(\Rightarrow2-x=22\)
\(\Rightarrow x=2-22\)
\(\Rightarrow x=-20\)
Vay...
\(b,11-\left(15+11\right)=x-\left(25-9\right)\)
\(\Rightarrow11-26=x-16\)
\(\Rightarrow-15=x-16\)
\(\Rightarrow-15+16=x\)
\(\Rightarrow x=1\)
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a) \(2x+5=\left(-10\right)-x\)
\(2x+x=-10-5\)
\(3x=-15\)
\(x=-15\div3\)
\(x=-5\)
\(5^2+125x=0\)
\(25+125x=0\)
\(125x=0-25\)
\(125x=-25\)
\(x=-25\div125\)
\(x=-\frac{1}{5}\)