Question

Решите пожалуйста срочно!!! 1)Упростить выражения -4c3b= -0,2x(-3y)= 2)Приведите подобные слагаемые 2x-7x-4x= 3)Раскройте скобки -2(3a-7)= 4)Решите уравнение 6-(x-5)=7

Answer 1

Ответ:

1)

-4c3b=-12bc

-0,2x(-3y)=0.6xy

2)

2x-7x-4x= = -5x-4x = -9x

3)

-2(3a-7)=-6a+14 = 14-6a

4)

6-(x-5)=7

x-5 = 6-7

x-5 = -1

x = -1+5

x = 4

Answer 2

1. Упрощение выражений: -4c3b = -0.2x(-3y)

-4c3b: Since there are no like terms or operations to simplify, the expression remains as is: -4c3b.

-0.2x(-3y): To simplify the expression, we can multiply the coefficients and apply the rule of signs. -0.2 multiplied by -3 gives us 0.6. So the simplified expression is 0.6xy.

Therefore, the simplified expressions are: -4c3b and 0.6xy.

2. Приведение подобных слагаемых: 2x - 7x - 4x

To combine like terms, we add or subtract their coefficients. In this case, we have the variable x in each term:

2x - 7x - 4x

Combining the coefficients, we have 2 - 7 - 4, which gives us -9.

Therefore, the simplified expression is -9x.

3. Раскрытие скобок: -2(3a - 7)

To expand the expression, we distribute -2 to each term inside the parentheses:

-2 * 3a - 2 * (-7)

Multiplying, we get:

-6a + 14

Therefore, the expanded form is -6a + 14.

4. Решение уравнения: 6 - (x - 5) = 7

To solve the equation, we need to isolate the variable x. Let's simplify the equation step by step:

6 - (x - 5) = 7

First, we can remove the parentheses using the distributive property:

6 - x + 5 = 7

Combining like terms, we have:

11 - x = 7

Next, we want to isolate the x term. We can do this by subtracting 11 from both sides of the equation:

11 - x - 11 = 7 - 11

Simplifying further:

-x = -4

To isolate x, we multiply both sides of the equation by -1:

(-1)(-x) = (-1)(-4)

This gives us:

x = 4

Therefore, the solution to the equation is x = 4.