Question

Решите уравнение=a) -3(x+3)=-12..........b)0,02x+1,38=-0,02.............B)5/x=-3/4

Answer 1

$a) - 3x - 9 = - 12 \\ - 3x = - 3 \\ x = 1$

$b)0.02x = - 1.4 \\ x = - 70$

$c)5 \div x = - 0.75 \\ x = 5 \div ( - 0.75) \\ x = - 6 \frac{2}{3}$

Answer 2

a) Let's solve the equation step by step:

-3(x + 3) = -12

First, distribute the -3 on the left side:

-3x - 9 = -12

Next, let's isolate the variable term by moving the constant term to the other side. We can do this by adding 9 to both sides:

-3x = -12 + 9 -3x = -3

Finally, divide both sides by -3 to solve for x:

x = -3 / -3 x = 1

So the solution to the equation is x = 1.

b) Let's solve the equation step by step:

0.02x + 1.38 = -0.02

First, isolate the variable term by moving the constant term to the other side. We can do this by subtracting 1.38 from both sides:

0.02x = -0.02 - 1.38 0.02x = -1.40

Next, divide both sides by 0.02 to solve for x:

x = -1.40 / 0.02 x = -70

So the solution to the equation is x = -70.

B) Let's solve the equation step by step:

5/x = -3/4

To eliminate the fraction, we can cross-multiply:

5 * 4 = -3 * x

20 = -3x

Now, isolate x by dividing both sides by -3:

x = 20 / -3

x ≈ -6.6667 (rounded to 4 decimal places)

So the solution to the equation is x ≈ -6.6667.