Question

Срочно спасите Решите уравнение 320-(b•4+120):5=40•6 450:(18-y:7)=7•8-36:6 5•(810:9-x•3)=40•8-5 За ответ 15 баллов

Answer 1

1) 320-(b•4+120):5=240
(4b+120):5=320-240
(4b+120):5=80
4b+120=80•5
4b=400-120
4b=280
b=70

Answer 2

Solving the Equation

To solve the given equation, we'll follow the order of operations (PEMDAS: Parentheses, Exponents, Multiplication and Division from left to right, Addition and Subtraction from left to right).

The given equation is: 320 - (b * 4 + 120) / 5 = 40 * 6 + 450 / (18 - y / 7) = 7 * 8 - 36 / 6 + 5 * (810 / 9 - x * 3) = 40 * 8 - 5

Let's solve it step by step.

Step 1: Simplify the Equation

First, simplify each part of the equation separately.

1. 320 - (b * 4 + 120) / 5 2. 40 * 6 + 450 / (18 - y / 7) 3. 7 * 8 - 36 / 6 + 5 * (810 / 9 - x * 3) 4. 40 * 8 - 5

Step 2: Solve Each Simplified Equation

1. 320 - (b * 4 + 120) / 5 - 320 - (b * 4 + 120) / 5 = 40 - 320 - (b * 4 + 120) = 40 * 5 - 320 - b * 4 - 120 = 200 - 200 - b * 4 = 200 - -b * 4 = 0 - b = 0

2. 40 * 6 + 450 / (18 - y / 7) - 40 * 6 + 450 / (18 - y / 7) = 40 * 6 + 450 / (18 - y / 7) - 240 + 450 / (18 - y / 7) = 240 + 450 / (18 - y / 7) - 450 / (18 - y / 7) = 450 / (18 - y / 7) - 18 - y / 7 = 18 - y / 7 - y = 0

3. 7 * 8 - 36 / 6 + 5 * (810 / 9 - x * 3) - 7 * 8 - 36 / 6 + 5 * (810 / 9 - x * 3) = 7 * 8 - 36 / 6 + 5 * (810 / 9 - x * 3) - 56 - 6 + 5 * (90 - 3x) = 56 - 6 + 5 * (90 - 3x) - 50 + 5 * (90 - 3x) = 50 + 5 * (90 - 3x) - 450 - 15x = 450 - 15x - -15x = -15x - x = 0

4. 40 * 8 - 5 - 40 * 8 - 5 = 40 * 8 - 5 - 320 - 5 = 320 - 5 - 315 = 315

Conclusion

The solutions to the given equation are: - b = 0 - y = 0 - x = 0