Question

: 10(х + 30) + 15(х – 30) = 2100

Answer 1

Объяснение:

10x+300+15x-450=2100

10x+15x=2100+150

25x=2250

x=90

Answer 2

To solve the equation 10(x + 30) + 15(x - 30) = 2100 for the variable x, follow these steps:

1. Distribute the constants on the left side of the equation to the terms inside the parentheses:

   10x + 300 + 15x - 450 = 2100

2. Combine like terms on the left side of the equation:

   (10x + 15x) + (300 - 450) = 2100

   25x - 150 = 2100

3. Add 150 to both sides of the equation to isolate the variable term:

   25x - 150 + 150 = 2100 + 150

   25x = 2250

4. Now, divide both sides of the equation by 25 to solve for x:

   (25x) / 25 = 2250 / 25

   x = 90

So, the solution to the equation 10(x + 30) + 15(x - 30) = 2100 is x = 90.