Question

3(10-7х)-х=-3 как решать? И -6х-4(9-7х)=--5х+1

Answer 1

Вот как-то так...............пиши , если будет непонятно

Answer 2

To solve the equations, we'll simplify and solve for the value of 'x' step by step. Let's start with the first equation:

1. 3(10-7x) - x = -3

Step 1: Distribute the 3 on the left side: 30 - 21x - x = -3

Step 2: Combine like terms on the left side: 30 - 22x = -3

Step 3: Move the constant term to the right side by adding 3 to both sides: 30 - 22x + 3 = 0 33 - 22x = 0

Step 4: Move the variable term to the right side by subtracting 22x from both sides: 33 - 22x - 22x = 0 - 22x 33 - 44x = 0

Step 5: Move the constant term to the left side by subtracting 33 from both sides: 33 - 44x - 33 = 0 - 33 -44x = -33

Step 6: Solve for 'x' by dividing both sides by -44: x = -33 / -44 x = 3/4 or 0.75

Now let's move on to the second equation:

2. -6x - 4(9-7x) = -(-5x + 1)

Step 1: Distribute the 4 on the left side: -6x - 36 + 28x = -(-5x + 1)

Step 2: Combine like terms on the left side: (-6x + 28x) - 36 = -(-5x + 1)

Step 3: Simplify further: 22x - 36 = -(-5x + 1)

Step 4: Distribute the negative sign on the right side: 22x - 36 = 5x - 1

Step 5: Move the variable term to the left side and the constant term to the right side: 22x - 5x = -1 + 36 17x = 35

Step 6: Solve for 'x' by dividing both sides by 17: x = 35 / 17 x ≈ 2.059 (rounded to three decimal places)

So, the solutions to the equations are:

1. x = 0.75
2. x ≈ 2.059