-2x-40=(5-x)-(-15+60)
tim x
tim x :-2x-40=(5-x)-(-15+60)
-2x-40=(5-x)-(-15+60)
=> -2x - 40 = 5 - x + 15 +60
=> -2x - 40 = 80 - x
=> -2x + x = 80 + 40
=> -x = 120
-2x-40=(5-x)-(-15+60)
-2x - 40 = 5 - x - 45
-2x - 40 = -x - 40
-2x + x = -40 + 40
-1x = 0
x = 0
tim x biet -2x-40=(5-x)-(-15+60)
\(-2x-40=\left(5-x\right)-\left(-15+60\right)\)
\(-2x-40=5-x+15-60\)
\(-2x+x=5+15-60+40\)
\(-x=0\Rightarrow x=0\)
-2x-40=(5-x)-(-15+60)
<=>-2x-40=5-x+15-60
<=>-2x-40=5-x-45
<=>-2x-40-5+x+45=0
<=>80-x=0
<=>x=80
Vậy x=80
Trả lời:
\(-2x-40=\left(5-x\right)-\left(-15+60\right)\)
\(\Leftrightarrow-2x-40=5-x-45\)
\(\Leftrightarrow-2x-40=x-40\)
\(\Leftrightarrow-2x-x=40-40\)
\(\Leftrightarrow-3x=0\)
\(\Leftrightarrow x=0\)
Vậy\(x=0\)
Hok tốt!
Good girl
tim x biet
(-25)-(5.x-3)=4
5.x-6=20-(12-6)
-2.x-40=(5-x)-(-15+60)
(-25)-(5.x-3)=4
5.x-3 = -25 - 4
5.x-3=-29
5.x=-26
x=-26/5
x=-5,2
5.x-6=20-(12-6)
5.x-6=20-6
5.x-6=14
5.x=20
x=20:5
x=4
vậy x=4
1/
-25-(5x-3)=4
-25-4=5x-3
-25-4+3=5x
5x= -26
x= -26/5
2/
5x-6=20-(12-6)
5x = 20-12+6+6
5x = 20
x = 20/5 = 4
3/
-2x -40 = (5-x) -(-15+60
-2x -40 = 5-x +15-60
-2x +x = 5+15-60+40
-x = 0
x=0
tìm x:
-2x-40=(5-x)-(-15+60)
-2x-40=(5-x)-(-15+60)
-2x-40=5-x+15-60
-2x+x=5+15-60+40
-x=0
=> x=0
các bạn cho mk vài li-ke cho tròn 230 với
<=> -2x - 40 = 5-x +15-60
<=> -2x + x = 5+15-60+40
<=> -x=0
=> x=0
-2x-40=(5-x)-(-15+60)
-2x-40=5-x-45
-2x-40=x-5-45
-2x-40=x-(-40)
x-2-40=x-(-40)
x-(-38)=x-(-40)
x-x=(-38)-(-40)
x-x=2
?????
mk tih hay that
Tìm x biết :
-2x - 40 = (5 - x) - (-15 + 60)
-2x-40=(5-x)-(-15+60)
=>-2x-40=5-x+15-60
=>-2x+x=5+15-60+40
=>-x=20-60+40=0
=>x=0
-2x-40=(5-x)-(-15+60)
-2x-40=5-x-45
-2x+x=5-45+40
-x =0
x =0
tìm x biết:
-2x-40=(5-x)-(-15+60)
\(-2x-40=5-x-45\)
\(\Leftrightarrow-x=0\)
\(\Leftrightarrow x=0\)
1 tìm x thuộc Z
-2x-40=(5-x)-(-15+60)
2.(x-5)-3(x+7)=14
-7.(5-x)-2(x-10)=15
x+18=2-2x
-2x - 40 = (5 - x) - (-15 + 60)
-2x - 40 = (5 - x) - 45
-2x - 40 = -40 - x
-2x - x = 40 - 40
-3x = 0
x = 0
2(x - 4) - 3(x + 7) = 14
2x - 8 - 3x - 21 = 14
-x - 29 = 14
-x = 14 + 29
-x = 43
x = -43
-7(5 - x) - 2(x - 10) = 15
-35 + 7x - 2x + 20 = 15
-15 + 5x = 15
5x = 15 + 15
5x = 30
x = 6
\(-2x-40=\left(5-x\right)-\left(-15+60\right)\)
\(\Leftrightarrow\)\(-2x-40=5-x+15-60\)
\(\Leftrightarrow\)\(-2x-40=-x-40\)
\(\Leftrightarrow\)\(-2x+x=40-40\)
\(\Leftrightarrow\)\(x=0\)
Vậy....
\(x+18=2-2x\)
\(2x+x=2-18\)
\(3x=-20\)
\(x=-20:3\)
\(x=\frac{-20}{3}\)
-2X-40=(5-X)-(-15+60)
\(-2x-40=\left(5-x\right)-\left(-15+60\right)\)
\(-2x-40=5-x+15-60\)
\(-2x-40=-40-x\)
\(-2x+x=-40+40\)
\(-x=0\)
\(x=0\)
Bài 1 :
60 - 15 =
-60 - 40
-115 -(-15)
0 - (-17)
0 - 344
-115 - (-415)
6 - 2016
288 - 688
911 - (-89)
(-442) - 352 +4321
bài 2 : tim x
a, x + 99 = 10
b, 33 - x = 42
c, 9 - x - 5 = -44
d, -2x + 8 = -66
Bài 1 : \(60-15=45\)
\(-60-40=-100\)
\(-115-\left(-15\right)=-115+15=-100\)
\(0-\left(-17\right)=0+17=17\)
\(0-344=-344\)
\(-115-\left(-415\right)=-115+415=300\)
\(6-2016=-2010\)
\(288-688=-400\)
\(911-\left(-89\right)=911+89=1000\)
\(\left(-442\right)-352+4321=3527\)
Bài 2 :
\(a,x+99=10\)
\(x=10-99\)
\(x=-89\)
\(b,33-x=42\)
\(x=33-42\)
\(x=-9\)
\(c,9-x-5=-44\)
\(4-x=-44\)
\(x=4+44\)
\(x=48\)
\(d,-2x+8=-66\)
\(-2x=-66-8\)
\(-2x=-74\)
\(x=37\)