Question

5x - 4,5 = 3x + 2,5 2x - (6x - 5) = 45 2 (3 - x) + 7x = 4 - (3x +2) x/3 + x-1/5 = 1

Answer 1

Ответ:

Я так понимаю нужно решить уравнения.

1. x=3.5

2. x=5

3. x=-0.5

4. x=0.9

Объяснение:

1. 5х-4.5=3х+2.5

   2x=7

2. 2x-6x-5=45

    -8x=40

3. 6-2x+7x=4-3x-2

   6+5x=2-3x

   8x=-4

4. x/3+x-1/5=1

   x/3+x=1.2

   4x/3=1.2

   4x=3.6

Answer 2

It looks like you've provided a set of equations. I'll help you solve them step by step:

Equation 1: 5x - 4.5 = 3x + 2.5

To solve for x: Subtract 3x from both sides: 2x - 4.5 = 2.5

Add 4.5 to both sides: 2x = 7

Divide both sides by 2: x = 3.5

Equation 2: 2x - (6x - 5) = 45

Distribute the negative sign: 2x - 6x + 5 = 45

Combine like terms: -4x + 5 = 45

Subtract 5 from both sides: -4x = 40

Divide both sides by -4: x = -10

Equation 3: 2(3 - x) + 7x = 4 - (3x + 2)

Distribute the 2 on the left side and the negative sign on the right side: 6 - 2x + 7x = 4 - 3x - 2

Combine like terms: 5x + 6 = 2 - 3x

Add 3x to both sides: 8x + 6 = 2

Subtract 6 from both sides: 8x = -4

Divide both sides by 8: x = -0.5

Equation 4: x/3 + (x - 1)/5 = 1

To simplify the fractions, find a common denominator, which is 15: Multiply the first fraction by 5/5 and the second fraction by 3/3: 5x/15 + 3(x - 1)/15 = 1

Combine the fractions: (5x + 3x - 3)/15 = 1

Combine like terms: 8x - 3 = 15

Add 3 to both sides: 8x = 18

Divide both sides by 8: x = 2.25

So, the solutions for the given equations are:

• Equation 1: x = 3.5
• Equation 2: x = -10
• Equation 3: x = -0.5
• Equation 4: x = 2.25