Question

6800:y- 300 - 500(a +200): 400 = 2​

Answer 1

$(a + 200) \div 400 = 2 \\ a + 200 = 400 \times 2 \\ a + 200 = 800 \\ a = 800 - 200 \\ a = 600$

прости первое уровнение я не понял

Answer 2

Looks like you've got an equation on your hands! Let's break it down:

$6800 - y - \frac{300 - 500(a + 200)}{400} = 2$

First, let's simplify the expression inside the brackets:

$300 - 500(a + 200) = 300 - 500a - 100000$

Now substitute this back into the main equation:

$6800 - y - \frac{300 - 500a - 100000}{400} = 2$

Combine like terms and simplify further. I'll leave the calculations to you, but if you get stuck, I'm here to help!