Question

1). 2(x-6)-x=3x+4x 2). 50-7x-16=3x-16 3). -(9-2b)-(b+5)=16 4). x-y=9 x+y=29 5). 2x+y=11 3x-y=4 Решите пожалуйста

Answer 1

1). 2(х-6)-х=3х+4х
2х-12-х=7х
2х-х-7х=12
-6х=12
х= -12÷6
х= -2
----------------------------
2(-2-6)-(-2)=3×(-2)+4×(-2)
-14= -14

2).50-7х-16=3х-16
50-16+16=3х+7х
50=10х
х=50÷10
х=5
-------------------------------
50-7×5-16=3×5-16
-1= -1

3). -(9-2b)-(b+5)=16
-9+2b-b-5=16
2b-b=16+9+5
b=30
---------------------------
-(9-(2×30))-(30+5)= -(9-60)-35= -9+60-35=16

Answer 2

1) 2х-12-х=7х
2х-х-7х=12
-6х=12
х=-2

2)50-7x-16=3x-16
-7x-3x=-16+16-50
-10x=-50
x=5

3)-9+2b-b-5=16
2b-b=16+5+9
b=30

4)x-y=9
x+y=29
выражаем из первого х
x=9+y
подставляем во второе уравнение
9+y+y=29
9+2y=29
2y=29-9
2y=20
y=10, х=9+10=19

5)2x+y=11
3x-y=4
выражаем из первого y
y=11-2x
подставляем во второе
3х-(11-2х)=4
3х-11+2х=4
5х=4+11
5х=15
х=3
у=11-2×3=11-6=5

Answer 3

1) 2(x-6)-x=3x+4x+2

To solve the equation 2(x-6)-x=3x+4x+2, we can follow these steps:

1. Distribute the 2 to the terms inside the parentheses: 2x - 12 - x = 3x + 4x + 2. 2. Combine like terms on both sides of the equation: x - 12 = 7x + 2. 3. Move all the x terms to one side and the constant terms to the other side: x - 7x = 2 + 12. 4. Simplify: -6x = 14. 5. Divide both sides of the equation by -6 to solve for x: x = -14/6, which simplifies to x = -7/3.

Therefore, the solution to the equation 2(x-6)-x=3x+4x+2 is x = -7/3.