Question

0.7-0.2x=0.3x-1.8срочно решите пж тест​

Answer 1

Ответ:

Пошаговое объяснение:

0.7-0.2x=0.3x-1.8

0,3x + 0,2x = 0,7 + 1,8

0,5x = 2,5

x = 2,5 : 0,5

x = 5

Answer 2

To solve the equation 0.7 - 0.2x = 0.3x - 1.8, we can follow these steps:

Step 1: Combine like terms on both sides of the equation. - On the left side, we have 0.7 - 0.2x. - On the right side, we have 0.3x - 1.8.

Step 2: Move all the terms with x to one side of the equation. - To do this, we can add 0.2x to both sides of the equation. - This gives us 0.7 = 0.3x - 1.8 + 0.2x.

Step 3: Simplify the equation. - On the right side, 0.3x + 0.2x can be combined to give 0.5x. - So, the equation becomes 0.7 = 0.5x - 1.8.

Step 4: Move the constant term to the other side of the equation. - To do this, we can add 1.8 to both sides of the equation. - This gives us 0.7 + 1.8 = 0.5x - 1.8 + 1.8.

Step 5: Simplify the equation. - On the left side, 0.7 + 1.8 can be combined to give 2.5. - On the right side, -1.8 + 1.8 cancels out, leaving us with 0.5x. - So, the equation becomes 2.5 = 0.5x.

Step 6: Solve for x. - To isolate x, we can divide both sides of the equation by 0.5. - This gives us 2.5/0.5 = (0.5x)/0.5.

Step 7: Simplify the equation. - On the left side, 2.5/0.5 can be simplified to 5. - On the right side, (0.5x)/0.5 simplifies to just x. - So, the equation becomes 5 = x.

Therefore, the solution to the equation 0.7 - 0.2x = 0.3x - 1.8 is x = 5.