Question

0,5 × (4+х) - 0,4 × (х - 3)=2,5

Answer 1

2+0,5х-0,4х+1,2=2,5
0,1х=-0,7
х=-7
Ответ:-7

Answer 2

To solve the equation 0.5 × (4 + x) - 0.4 × (x - 3) = 2.5, we can follow these steps:

Step 1: Distribute the multiplication to simplify the equation: 0.5 × 4 + 0.5 × x - 0.4 × x + 0.4 × 3 = 2.5

Simplifying further, we get: 2 + 0.5x - 0.4x + 1.2 = 2.5

Step 2: Combine like terms: 0.1x + 3.2 = 2.5

Step 3: Move the constant term to the other side of the equation: 0.1x = 2.5 - 3.2

Simplifying further, we get: 0.1x = -0.7

Step 4: Solve for x by dividing both sides of the equation by 0.1: x = -0.7 / 0.1

Simplifying further, we get: x = -7

Therefore, the solution to the equation is x = -7.