Question

Problem 3
Is the solution positive or negative?

2⋅x=6
-2⋅x=6.1
2.9⋅x=-6.04
-2.473⋅x=-6.859

Answer 1

Answer:

Step-by-step explanation:

Solve for x each equation to find the the solution positive or negative.

1) 2x = 6

   ∴ x = 6/2 = 3 ⇒ positive solution

2) -2x = 6.1

   ∴ x = 6.1/(-2) = -3.05  ⇒ negative solution

3) 2.9* x= -6.04

   ∴ x = -6.04/2.9 = -2.08 ⇒ negative solution

4) -2.473 * x=- 6.859

   ∴ x = ( - 6.859)/( -2.473) = 2.77 ⇒ positive solution

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Notes: the rules of positive and negative signs:

$\frac{+}{+} =+\\\frac{+}{-} =-\\\frac{-}{+} =-\\\frac{-}{-} =+$

The same rules are correct if replaced the division by the multiplication.