Tìm số nguyên x,biết
a,-14 - 7+ x= -12
b, x+(-15)-(-6)=11
c, x- mở ngoặc vuông 18+(-7) đóng ngoặc vuông = 15
d, -84- (-18-6) = x + (-20)
Giúp mình nhé thank you
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47 - mở ngoặc vuông mở ngoặc tròn 45 x 2 mũ 4 - 5 mũ 2 x 12 đóng ngoặc tròn chia 14 đóng ngoặc vuông
a,-14-7+x=-12 b,x+(-15)-(-6)=11 c,x-[18+(-7)]=15 d,-84-(-18-6)=x+(-20)
-21+x=-12 x+(-15)+6=11 x-11=15 -84-(-12)+x+(-20)
x=-12-(-21) x+(-9)=11 x=15+11 x+(-20)=-84+12
x=-12+21 x=11-(-9) x=26 x+(-20)=-62
x=9 x=11+9 x=-62-(-20)
x=20 x=-62+20
x=-42
[61+(53-x)].17=1785
[61+(53-x)]=1785:17=105
61+(53-x)=105
53-x=105-61
53-x=44
x=44+55
x=99
vay x=99
[61+(53-x)].17=1785
=>[61+(53-x)]=1785:17
=>114 -x=105
=>x=114-105
=>x=9
a: =7/8:(2/9-18+1/36)-5/12
=-7/142-5/12=-397/852
b: =3/7(4/9+5/9:6/12)=2/3
c: =5^8(16/31-47/31)+1/3=-5^8+1/3
d: =7/2(3/8+5/8:4/15)=609/64
\(a,\Rightarrow\left(35x+3\right)\cdot19=152\\ \Rightarrow35x+3=8\\ \Rightarrow x=\dfrac{1}{7}\\ b,\Rightarrow3\left(x+7\right)=42\\ \Rightarrow x+7=14\Rightarrow x=7\\ c,\Rightarrow3\left(x+1\right)=48\\ \Rightarrow x+1=16\Rightarrow x=15\\ d,\Rightarrow120-5x+100\cdot2:5=4\cdot15\\ \Rightarrow120-5x+40=60\\ \Rightarrow5x=100\Rightarrow x=20\\ e,\Rightarrow4x-10=30\\ \Rightarrow4x=40\\ \Rightarrow x=10\\ g,\Rightarrow10x+10=70\\ \Rightarrow10x=60\\ \Rightarrow x=6\)
a) \(\left(15-x\right)+\left(x-12\right)=7-\left(-8+x\right)\)
\(15-x+x-12=7+8-x\)
\(x=12\)
b) \(x-\left\{55-\left[49+\left(-28-x\right)\right]\right\}=13-\left\{47+\left[25-\left(32-x\right)\right]\right\}\)
\(x-55+49-28-x=13-47-25+32-x\)
\(x=7\)
\(a,\left(15-x\right)+\left(x-12\right)=7-\left(-8+x\right)\)
\(15-x+x-12=7+8-x\)
\(15-x=3\)
\(x=12\)
\(b,x-\left\{55-\left[49+\left(-28-x\right)\right]\right\}=13-\left\{47+\left[25-\left(32-x\right)\right]\right\}\)
\(x-\left[55-\left(49-28-x\right)\right]=13-\left[47+\left(25-32+x\right)\right]\)
\(x-\left(55-49+28+x\right)=13-\left(47+25-32+x\right)\)
\(x-\left(34+x\right)=13-\left(40+x\right)\)
\(x-34-x=13-40-x\)
\(-27-x=-34\)
\(x=-27--34\)
\(x=7\)
\(c,\left|x-10\right|-\left|-12\right|=4\)
\(\left|x-10\right|-12=4\)
\(\left|x-10\right|=16\)
\(\Rightarrow x-10=16\)hoặc \(x-10=-16\)
\(x=26\)hoặc \(x=-6\)
ko rảnh thì thôi đừng trả lời linh tinh chứ
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a, -14 - 7 + x = -12
\(\Leftrightarrow-21+x=-12\)
\(\Leftrightarrow x=-12+21\)
\(\Leftrightarrow x=9\)
b, \(x+\left(-15\right)-\left(-6\right)=11\)
\(\Leftrightarrow x-15+6=11\)
\(\Leftrightarrow x-\left(15-6\right)=11\)
\(\Leftrightarrow x-9=11\)
\(\Leftrightarrow x=11+9\)
\(\Leftrightarrow x=20\)
c, \(x-\left[18+\left(-7\right)\right]=15\)
\(\Leftrightarrow x-\left(18-7\right)=15\)
\(\Leftrightarrow x-11=15\)
\(\Leftrightarrow x=15+11\)
\(\Leftrightarrow x=26\)
d, \(-84-\left(-18-6\right)=x+\left(-20\right)\)
\(\Leftrightarrow-84-\left(-24\right)=x+\left(-20\right)\)
\(\Leftrightarrow-84+24=x+\left(-20\right)\)
\(\Leftrightarrow-60=x+\left(-20\right)\)
\(\Leftrightarrow x=-20+60\)
\(\Leftrightarrow x=40\)