Question

12+7х-(1-3х) при х=-1,7;

Answer 1

12+7x-1+3x=10x+11. подставляем значение: 10*(-1,7)+11= -17+11= -6. Ответ: -6.

Answer 2

To evaluate the expression 12 + 7x - (1 - 3x) at x = -1.7, you simply substitute the value of x into the expression and perform the arithmetic operations. Let's do the calculations step by step:

1. Replace x with -1.7 in the expression: 12 + 7(-1.7) - (1 - 3(-1.7))

2. Calculate the innermost parentheses first: 12 + 7(-1.7) - (1 + 5.1)

3. Continue with the multiplication: 12 - 11.9 - 6.1

4. Finally, perform the addition and subtraction: 12 - 11.9 - 6.1 = -5.9

Therefore, when x = -1.7, the expression 12 + 7x - (1 - 3x) evaluates to -5.9.