Question

19,7x - 32,3y - 3,5(3x-8y + 10 при х =-20, y= -5

Answer 1

19.7Х - 32.3У - 10.5Х + 28У - 35

9.2Х - 4.3У - 35

9.2 * (-20) - 4.3 * (-5) - 35 = -197.5

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Answer 2

To find the value of the expression 19.7x - 32.3y - 3.5(3x - 8y + 10) when x = -20 and y = -5, we need to substitute these values into the expression and then perform the calculations. Let's do that step by step:

1. Substitute the values of x and y into the expression: 19.7(-20) - 32.3(-5) - 3.5(3(-20) - 8(-5) + 10)

2. Perform the calculations within parentheses: 19.7(-20) - 32.3(-5) - 3.5(3(-20) + 40 + 10)

3. Continue with the calculations inside the second set of parentheses: 19.7(-20) - 32.3(-5) - 3.5(-60 + 40 + 10)

4. Perform the calculations within the second set of parentheses: 19.7(-20) - 32.3(-5) - 3.5(-10)

5. Multiply the numbers outside the parentheses: -394 - (-161.5) + 35

6. Perform the calculations: -394 + 161.5 + 35

7. Finally, add the numbers: -197.5 + 35

8. The final result is: -162.5

Therefore, when x = -20 and y = -5, the expression 19.7x - 32.3y - 3.5(3x - 8y + 10) evaluates to -162.5.