9x-2(x-29)=-47
=>9x-2x+58=-47
=>7x=-105
=>x=-15
vậy x=-15
2x-5(x+3)=-75
=>2x-5x-15=-75
=>-3x=-60
=>x=20
vậy x=20
3x-14=2(x-9)+1
=>3x-14=2x-18+1
=>x=-3
vậy x=-3
9x-2(x-29)=-47
=>9x-2x+58=-47
=>7x=-105
=>x=-15
vậy x=-15
2x-5(x+3)=-75
=>2x-5x-15=-75
=>-3x=-60
=>x=20
vậy x=20
3x-14=2(x-9)+1
=>3x-14=2x-18+1
=>x=-3
vậy x=-3
Tìm x:
a) \(\left|x-2\right|=3\)
\(\left|x-1\right|>1\)
\(2< \left|x\right|< 5\)
b) \(-x.\left(x+3\right)=0\)
\(\left(x-2\right).\left(3x-9\right)=0\)
P/s: Giusp với
giúp mình nhé:
3.(2-x)+5.(x-6)=-98
6) x-1/2=9/2
7) x+5/4=-3/4
8) x+2/7=5/7
9) x-4/3=1/3
10) x+5/2=-7/2
1) x+1/2=-5/3
2) 1/3-x=3/5
4) x-4/3=-7/9
5) x--7/3=5/6
6) x-1/5=9/10
7) x+5/12=3/8
8) x+5/4=7/6
9) x-2/7=1/35
10) x-2/7=-7/10
1) x+1/2=-5/3
2) 1/3-x=3/5
4) x-4/3=-7/9
5) x--7/3=5/6
6) x-1/5=9/10
7) x+5/12=3/8
8) 5/4=7/6
9) x-2/7=1/35
10) x-2/7=-7/10
cả phép tính nữa nha
1.Tính tổng:
S=x+|x|+x+|x|+x+|x|+x+|x|+x+|x|+x
2.Tính tổng
S1=1+(-2)+3+(-4)+...+(-2018)
S2=1+(-3)+5+(-7)+...+(+2001)
S3=1+(-2)+(-3)+4+5+(-6)+(-7)+8+9
xy+14+2y+7x=-10
xy+5x+y=4
xy+x+y=2
xy-10+5x-3y=2
xy-1=3x+5y+4
3x+4y-xy=15