Question

1)6×(a+0,5)-4×(a-2,8) 2)2,5x+12=2x-13 допоможіть,будь ласка

Answer 1

Пошаговое объяснение:

1) 6*(a + 0,5) - 4*(a - 2,8)  = 2a + 14,2

  6*(a + 0,5) - 4*(a - 2,8) = 6a + 3 - 4a + 11,2 = 2a + 14,2

 

2) 2,5x + 12 = 2x - 13

   2,5x - 2x = - 13 - 12

   0,5x = -25

   x = -25 : 0,5

   x = -50

Answer 2

1) 6*(а+0,5)-4*(а-2,8)=6а+3-4а+11,2=2а+14,2

2) 2,5х+12=2х-13

2,5х-2х=-12-13

0,5х=-25

х=-25/0,5

х=50

Answer 3

Sure, I'd be happy to help you with these expressions.

1. To simplify the expression 6×(a+0.5) - 4×(a-2.8), follow these steps:

Step 1: Distribute the multiplication. 6×a + 6×0.5 - 4×a + 4×2.8

Step 2: Combine like terms. 6×a - 4×a + 6×0.5 + 4×2.8

Step 3: Simplify the arithmetic. (6-4)×a + 6×0.5 + 4×2.8

Step 4: Continue simplifying. 2×a + 3 + 11.2

Step 5: Combine constants. 2×a + 14.2

The simplified expression is 2×a + 14.2.

2. To solve the equation 2.5x + 12 = 2x - 13, follow these steps:

Step 1: Get all the x terms on one side of the equation and constants on the other side. 2.5x - 2x = -13 - 12

Step 2: Perform the arithmetic. 0.5x = -25

Step 3: Isolate x by dividing both sides by 0.5 (the coefficient of x). x = -25 / 0.5

Step 4: Simplify the division. x = -50

The solution to the equation is x = -50.

If you have any more questions or need further assistance, feel free to ask!