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\(-2x-\left(x-17\right)=34-\left(-x+25\right)\)
\(\Leftrightarrow-2x-x+17=34+x-25\)
\(\Leftrightarrow-3x+17=x+9\)
\(\Leftrightarrow4x=8\)
\(\Leftrightarrow x=2\)
\(-2x-\left(x-17\right)=34-\left(-x+25\right)\)
\(\Rightarrow-2x-x+17=34+x-25\)
\(\Rightarrow-3x+17=34-25+x\)
\(\Rightarrow-3x+17=9+x\)
\(\Rightarrow17-9=x+3x\)
\(\Rightarrow8=4x\)
\(\Rightarrow x=2\)
Vậy \(x=2\)
A , 3 - ( 17 - x ) = 289 - ( 36 + 289 )
3 - 17 + x = 0 - 36
-14 + x = -36
x = -36 - ( - 14 ) = -22
B, 25 - ( x + 5 ) = -415 - ( 15 - 415 )
25 - x - 5 = 0 - 15
20 - x = -15
x = 20 - ( - 15 ) = 35
C , 34 + ( 21 - x ) = ( 3747 - 30 ) - 3746
34 + 21 - x = 1 - 30
55 - x = -29
x = 55 - (-29 ) = 74
D , -2x - ( x -17 ) = 34 - ( -x + 25 )
- 2x - x + 17 = 34 - 25 + x
- 3x + 17 = 9 + x
- 3x - x = 9 - 17
-4x = -8
x = -8 : ( - 4 )
x = 2
E , 17x + ( -16x - 37 ) = x + 43
17x - 16x -37 = x + 43
x - 37 = x + 43
-37 - 43 = x - x
- 80 = 0 ( vô lý )
G , ( x + 12 ) . (x - 3 ) = 0
\(\hept{\begin{cases}x+12=0\\x-3=0\end{cases}}\)
\(\hept{\begin{cases}x=-12\\x=3\end{cases}}\)
x-(-25-17-x)=6+x
suy ra x+25+17+x=6+x
2x+42=6+x
x=-36
please help me tick nha!!!!
\(x+30=-3-2x\)
\(\Rightarrow3x=-33\)
\(\Rightarrow x=-11\)
\(x-17=\left(-8\right)-17\)
\(\Rightarrow x=-8-17+17\)
\(\Rightarrow x=-8\)
\(25-\left(11+x\right)=x-\left(34-18\right)\)
\(\Rightarrow25-11-x=x-34+18\)
\(\Rightarrow-x-x=-34+18+11-25\)
\(\Rightarrow-2x=-30\)
\(\Rightarrow x=15\)
\(6-\left(17-x\right)=3x-7\)
\(\Rightarrow6-17+x=3x-7\)
\(\Rightarrow x-3x=-7+17-6\)
\(\Rightarrow-2x=4\)
\(\Rightarrow x=-2\)
Trả lời:
-2x - (x - 17) = 34 - (-x + 25)
-2x - x + 17 = 34 + x - 25
-3x + 17 = 9 + x
-3x - x = 9 - 17
-4x = -8
x = 2
Vậy x = 2
Hok tốt!
Vuong Dong Yet
\(-2x-\left(x-17\right)=34-\left(-x+25\right)\)
\(-2x-x+17=34+x-25\)
\(-2x-x-x=34-17-25\)
\(-4x=-8\)
\(x=2\)