Question

1)4х=-16.8 2)-7.9х=-18.53 3)-2/3:х=1 4)4.5:а=-15

Answer 1

Ответ:

Пошаговое объяснение:

1)4х= -16,8

х= -16,8÷4

х= -4,2

2)-7,9х= -18,53

х= -18,53÷(-7,9)

х≈2,4

3)-2/3÷х=1

х=1÷(-2/3)

х= -2/3

4)4,5÷а= -15

а= 4,5÷(-15)

а= -0,3

Answer 2

Ответ:

Пошаговое объяснение:

1)4х=-16.8

Х=-16,8:4

Х=-4,2

2)-7.9х=-18.53

Х=-18,53:(-7,9)

Х=приблизительно 2,35

3)-2/3:х=1

Х=-2/3:1

Х=-2/3

4)4.5:а=-15

А=4,5:(-15)

А=-0,3

Answer 3

It seems like you have provided a set of equations. To solve for the variables in each equation, I'll go through them one by one:

1. $4x = -16.8$ To solve for $x$, divide both sides of the equation by 4: $x = \frac{-16.8}{4} = -4.2$

2. $-7.9x = -18.53$ To solve for $x$, divide both sides of the equation by -7.9: $x = \frac{-18.53}{-7.9} \approx 2.346$

3. $-\frac{2}{3x} = 1$ To solve for $x$, first isolate $x$ by multiplying both sides of the equation by $-\frac{3}{2}$: $\frac{2}{3x} \cdot \left(-\frac{3}{2}\right) = 1 \cdot \left(-\frac{3}{2}\right)$ $\frac{2 \cdot (-3)}{3x} = -\frac{3}{2}$ $-\frac{6}{3x} = -\frac{3}{2}$ Now, cross-multiply and solve for $x$: $-6 = -\frac{9x}{2}$ Multiply both sides by $-\frac{2}{9}$: $x = \frac{4}{3}$

4. $\frac{4.5}{a} = -15$ To solve for $a$, first isolate $a$ by multiplying both sides of the equation by $\frac{1}{4.5}$: $\frac{4.5}{a} \cdot \frac{1}{4.5} = -15 \cdot \frac{1}{4.5}$ $1 = -\frac{15}{4.5a}$ Now, solve for $a$: $-\frac{15}{4.5a} = 1$ $-\frac{15}{a} = 4.5$ Multiply both sides by $-\frac{a}{15}$: $1 = -\frac{a}{3}$ $a = -3$

So, the solutions for the variables in each equation are:

1. $x = -4.2$
2. $x \approx 2.346$
3. $x = \frac{4}{3}$
4. $a = -3$