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\(1\)) \(5-\left(10-x\right)=7\)
\(10-x=5-7\)
\(10-x=-2\)
\(x=10-\left(-2\right)\)
\(x=12\)
\(2\)) \(-32-\left(x-5\right)=0\)
\(x-5=-32-0\)
\(x-5=-32\)
\(x=-32+5\)
\(x=-27\)
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a) \(5x+x=39-3^{11}:3^9\)
\(6x=39-3^2\)
\(x=30:6\)
\(x=5\)
vậy \(x=5\)
b) \(7x-x=5^{21}:5^{19}+3.2^2-7^0\)
\(6x=5^2+12-1\)
\(6x=36\)
\(x=6\)
vậy \(x=6\)
câu c tương tự nha
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7X + 15 = -(5X - 39) <=> 7X + 15 = -5X + 39 <=> 12X = 24 <=> x= 2
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a, 4x -15=-75-x b,72-3x= 5x+8
4x+x=-75+15 -3x-5x=8-72
5x=-60 -8x=-64
x=-60:5 8x=64
x=-14 x=64:8
x=8
c,3Ix-7I=21 d,-7Ix+3I=-49
Ix-7I=21:3 Ix+3I=-49:-7
Ix-7I=7 Ix+3I=7
x-7=7 hoặc x-7=-7 x+3=7 hoặc x+3=-7
x=14 hoặc x=0 x=4 hoặc x=-10
15+39(5x-6)=72
<=>39(5x-6)=57
<=>5x-6=19/13
<=>5x=97/13
<=>x=97/65
15+39.(5x-6)= 72
39.(5x-6)= 72-15
39.(5x-6)= 57
5x-6= 57:39
5x-6= \(\frac{19}{13}\)
5x= \(\frac{19}{13}+6\)
5x= \(\frac{19}{13}+\frac{78}{13}\)
5x= \(\frac{97}{13}\)
x= \(\frac{97}{13}:5\)
\(x=\frac{97}{13}.\frac{1}{5}\)
\(x=\frac{97}{65}\)