Question

При якому значенні х різниця виразів 3х і 2(3х -1) дорівнює 2х + 7?

Answer 1

3х и 2*(3х-1)

3х-2*(3х-1)=2х+7

3х-6х+2=2х+7

3х-6х-2х=7-2

-5х=5

х=5:(-5)

х= -1

Ответ: При х= -1

ПРОВЕРИМ

3*(-1)-2*(3*(-1)-1)=2*(-1)+7

5=5

Answer 2

Solving the Equation

To find the value of x in the equation 3x + 2(3x - 1) = 2x + 7, we need to simplify the expression and solve for x.

Let's start by simplifying the expression on the left side of the equation:

3x + 2(3x - 1) = 2x + 7

First, distribute the 2 to the terms inside the parentheses:

3x + 6x - 2 = 2x + 7

Combine like terms:

9x - 2 = 2x + 7

Next, move all the terms with x to one side of the equation and the constant terms to the other side:

9x - 2x = 7 + 2

Simplify:

7x = 9

Finally, solve for x by dividing both sides of the equation by 7:

x = 9/7

Therefore, the value of x that satisfies the equation 3x + 2(3x - 1) = 2x + 7 is x = 9/7.

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