We know the equation 2x − a with respect to X 3-x−a 2 = X-1 is the same as the solution of equation 3 (X-2) = 4x-5

We know the equation 2x − a with respect to X 3-x−a 2 = X-1 is the same as the solution of equation 3 (X-2) = 4x-5

(X-2) = 4x-5, 3x-6 = 4x-5, 3x-6 = 4x-5, 3x-4x = -5 + 5 + 6, - x = 1, x = -1,

It is known that the equation about X is 2x-a-2, x-a = X-1 and equation 3 (X-2) = 4x-5 have the same solution. Find the value of A

From 3 (X-2) = 4x-5, x = - 1 is introduced into the equation 2x-a / 3-x-a / 2 = X-1, and - 2-A / 3 + 1-A / 2 = - 2-A / 3-A / 2 = - 1 A / 3 + A / 2 = 1 5A / 6 = 1 a = 6 / 5

The following equation: 2x + 3 - (4x) = 3?

4x + 3(2x - 3) = 12 - (x + 4)
4x + 6x - 9 = 12 - x - 4
10x - 9 = 8 - x
10x + x = 8 + 9
11x = 17
x = 17 ÷ 11
x = 17/11

Solving the equation: 2x-1 / 3 times (x + 1) = 4x - (2x + 50%)

2x-1/3(x+1)=4x-(2x+50%)
2x-(1/3)x-1/3=4x-2x-0.5
(5/3)x-1/3=2x-0.5
(5/3)x-2x=-0.5+1/3
(-1/3)x=-1/6
x=1/2

Simplify and then evaluate: (3x x−2−x x+2)÷2x X2 − 4, where x = 3

(3x
x−2−x
x+2)÷2x
x2−4
=3x(x+2)−x(x−2)
(x−2)(x+2)．(x−2)(x+2)
2X (3 points)
=X + 4; (5 points)
When x = 3, the original formula = 3 + 4 = 7. (7 points)

First simplify, then evaluate: (x + 2) (x-3) - 3x (x-1) + (2x-1) 2, where x = 1 2．

（x+2）（x-3）-3x（x-1）+（2x-1）2
=x2+2x-3x-6-（3x2-3x）+（4x2-4x+1）
=2x2-2x-5，
When x = 1
At 2:00,
Original formula = 2 × (1
2）2-2×1
2-5=-51
2．

First, it is simplified, and then it is evaluated (x 2 - 1 / 3x + 4-x-1 / 2) divided by X? - 2x + 1 / x + 2, Where x is the inequality system x + 4 > 0,2x + 5

x+4>0
x>-4
2x+5

2 + 2 3x), where x = − 1 2．

The original formula = x2 + 2x + 3x2-2x,
=4x2，
When x = 1
2, the original formula = 4 × 1
4=1．

Simplify and then evaluate: 5x? - [3x-2 (2x-3) - 4x?], where x = - 1 / 2

5x²-[3x-2(2x-3)-4x²]
=5x²-[3x-4x+6-4x²]
=5x²-[-x+6-4x²]
=5x²+x-6+4x²
=5x²+4x²+x-6
=9x²+x-6
=9*(-1/2)²-1/2-6
=9/4-1/2-6
=9/4-2/4-24/4
=(9-2-24)/4
=-17/4

In the result of factorization of polynomial 2x2 + 5x + m, one factor is x + 3. Try to decompose this polynomial into factor

When m = - 3, 2x2 + 5x-3 = (2x-1) (x + 3)