Question

У - 3,5 = 0,5 -6 + Z = 0 Z/5 + 3 = -7 2,8 - а = -2,8

Answer 1

1.y-3,5=0.5

y=0.5+3.5

y=4

проверка:4-3.5=0.5

2.-6+Z=0

Z=0+6

Z=6

Проверка: -6+6=0

3.Z/5+3=-7

Z/5=-7-3

Z=-10×5

Z= -50

Проверка: -50/5+3=-7

4. 2.8-a=-2.8

-a=-2.8-2.8

-a=-5.6

a=5.6

проверка:2.8-5.6=-2.8

Answer 2

Let's solve each equation step by step:

1. Equation 1: У - 3.5 = 0.5 - 6 + Z = 0 To simplify this equation, we can combine like terms: У - 3.5 + Z = -5.5 Now, rearrange the terms to isolate У: У = -5.5 - Z + 3.5 У = -2 - Z

2. Equation 2: Z/5 + 3 = -7 To isolate Z, we can start by subtracting 3 from both sides of the equation: Z/5 = -7 - 3 Z/5 = -10 Next, multiply both sides of the equation by 5 to get rid of the fraction: Z = -10 * 5 Z = -50

3. Equation 3: 2.8 - а = -2.8 To isolate а, we can start by subtracting 2.8 from both sides of the equation: -а = -2.8 - 2.8 -а = -5.6 Now, multiply both sides of the equation by -1 to solve for а: а = 5.6

So, the solutions to the given equations are: У = -2 - Z (where Z = -50) У = -2 - (-50) У = 48

Z = -50

а = 5.6