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4X+160-8X=120 The original formula is 4x + (20-x) X8. If you think I'm wrong, please help me solve it
4X+160-8X=120
4X=40
X=10
Do you meet 4x-8x
Just move each other
4X+160-8X=120
4X+160=120+8X
Subtract 4x from both sides
160=120+4X
4X = 160-120
The solution equation: (1) (2x + 1) 2 = 3 (2) x2 + 2x-24 = 0 (3) 2x2-4x + 5 = 0 (4) 4x2 + 4x + 10 = 1-8x (5) 9x2 + 6x + 1 = 0 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; (6) x2-5x-14 = 0
(1) (2x + 1) 2 = 3, 2x + 1 = ± 3, the solution is: X1 = − 1 + 32, X2 = − 1 − 32; (2) x2 + 2x-24 = 0, (x + 6) (x-4) = 0, the solution is: X1 = - 6, x2 = 4; (3) 2x2-4x + 5 = 0 ∵ B 2-4ac = 16-4 × 2 × 5 = - 24 ＜ 0, the equation has no real root; (4) 4x2 + 4x + 10 = 1-8x
The solution equation is 4x ^ 2-8x = 0,
4x^2-8x=0
4x(x-2)=0
x1=0 x2=2
If the solution of the equation 5x - (4k-1) = 7x + 4k-3 about X is?
(1) Nonnegative number
(2) Negative number
Find the value range of K.
It is known that the solution of the equation is non positive, so in example 8, if the solution of the equation 5x - (4k-1) = 7x 4k-3 about X is: (1) non negative, (2) negative, try to determine the value range of K
Solve the equation x: 3x + 4 (716-4x) △ 3 = 705
3X+4(716-4x)÷3=705
3x+(2864-16x)/3=705
9x+2864-16x=2115
-7x=-749
x=107
Solving equation 0.7x/3 = x / 0.7-1
0.7x/3=x/0.7-1
7x/30 = 10x/7 -1
49x = 300x- 210
251x=210
x=210/251
Solve the equation, x ^ 3 + 2x-3 = 0, ask the great God for help
The solution x + 2x-1-2 = 0 (x-1) + (2x-2) = 0 (x-1) (x + X + 1) + 2 (x-1) = 0 (x-1) (x + X + 3) = 0 △ = 1-4x3 = - 11 < 0 shows that the following formula is always greater than 0, so x = 1
Solution equation: 2x2-7x + 3 = 0
The original equation can be transformed into (2x-1) (x-3) = 0, 2x-1 = 0 or x-3 = 0, X1 = 12, X2 = 3
X-0.7x = 0.06 (solving equation)
（1-0.7)x=0.06
0.3x=0.06
x=0.06÷0.3
x=0.2
0.7x/3=8.19!
0.7x/3=8.19
0.7x=8.19×3
x=24.57÷0.7
x=35.1
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