Question

7-2b,мундагы b=-1,3. 2)8c-9,мундагы c=-3,6. 3)4+5d=-3,6​

Answer 1

1) 7 - 2b, если b = -1,3

7 - 2 · (-1,3) = 7 - (-2,6) = 7 + 2,6 = 9,6.

2) 8с - 9, если с = -3,6

8 · (-3,6) - 9 = -28,8 - 9 = -37,8.

3) 4 + 5d, если d = -3,6

4 + 5 · (-3,6) = 4 + (-18) = 4 - 18 = - 14.

Answer 2

To solve these equations, let's substitute the given values of variables and find the solutions:

1. For the equation 7 - 2b, where b = -1.3: Substitute b = -1.3 into the equation: 7 - 2(-1.3) = 7 + 2.6 = 9.6

   Therefore, the solution to the equation 7 - 2b, where b = -1.3, is 9.6.

2. For the equation 8c - 9, where c = -3.6: Substitute c = -3.6 into the equation: 8(-3.6) - 9 = -28.8 - 9 = -37.8

   Therefore, the solution to the equation 8c - 9, where c = -3.6, is -37.8.

3. For the equation 4 + 5d = -3.6: Subtract 4 from both sides of the equation: 5d = -3.6 - 4 = -7.6

   Divide both sides of the equation by 5: d = -7.6/5 = -1.52

   Therefore, the solution to the equation 4 + 5d = -3.6 is d = -1.52.