Solution equation: 27 (x-3) &# 179; = - 1000

Solution equation: 27 (x-3) &# 179; = - 1000

27（x-3)³=-1000
3(x-3)=-10
3x-9=-10
3x=-1
x=-1／3

（1000x+1000x X 0.5%) - (5000+5000X0.5%)≥1000

1000x(1+0.5%)-5000x(1+0.5%)≥1000
x(1+0.5%)-5x(1+0.5%)≥1
-4.02x≥1
x≤-0.249

How much larger is LG (1000x) than LG X / 1000?

lg(1000x）-lg x/1000=3+lgx- （lgx-3）=6

[2000 * x% + 1000 * (3.24% - x%)] * 80% = 43.92 how to solve this equation

First simplify, multiply both sides by 1.25, and simplify the percent sign
20x+32.4-10x＝54.9
10 x = 22.5
x＝2.25

(1000 * 80% + 300 + 20% x) / (1000 + 300 + x) = 50% to solve the equation

（1000*80%+300+20%X)/(1000+300+X)=50%
(10*80+300+0.2x)/(1300+x)=0.5
1100+0.2x=650+0.5x
0.3x=450
x=1500

The solution equation: [2000 (1 + x) - 1000] (1 + x) = 1091.8

8 = 0, a = 2000, B = 3000, C = - 91. 8, x = − B ± B2 − 4ac2a = − 3000 ± 30002 − 4 × 2000 × (− 91. 8) 2 × 2000 = − 3000 ± 20243384000, ｜ X1 = − 150 + 24338200, X2 = − 150 − 24338200

（1000-10x）*（x-40）=8000

Divide both sides by - 10
(x-100)(x-40)=-800
x²-140x+4000=-800
x²-140x+4800=0
(x-60)(x-80)=0
x=60,x=80

X-5y = 3 and 5x + 3Y = 15 to find X and y of two equations

Multiply both sides of the first formula by 5, and you can see that 5x-25y = 15. Compare with the second formula, you know y = 0, and then you know x = 3

How to solve the equation x ^ 2 + (1000-x) ^ 2 = 4x ^ 2,

x²＋（1000－x）²＝4x²
3x²＝（1000－x）²
√3x＝±（1000－x）
① When √ 3x = 1000-xs,
（√3＋1）x＝1000
x＝1000/（√3＋1）
x＝500（√3－1）
② When √ 3x = - (1000-x),
（√3＋1）x＝－1000
x＝－1000/（√3＋1）
x＝－500（√3－1）

X/(X+1000)=5%

x/(x+1000)=5%
===> (x+1000)/x=20
===> x+1000=20x
===> 19x=1000
===> x=1000/19