Question

3|5x+7|=18 ПЛИЗ СРОЧНОО

Answer 1

Пошаговое объяснение:

3|5x+7|=18

|5x+7|=18:3

|5x+7|= 6

5x+7=+6

5x+7=-6

5x= 6-7 5x= -6-7

5x=-1 5x= -13

x= -1/5 x2= -13/5

x= -0,2

x2 = -2,6

Answer 2

To solve the absolute value equation $3|5x+7|=18$, you need to consider two cases, one where the expression inside the absolute value is positive and the other where it is negative.

Case 1: $5x+7$ is positive:

If $5x+7$ is positive, the equation becomes $3(5x+7) = 18$.

Simplify this equation:

$15x + 21 = 18$

$15x = 18 - 21$

$15x = -3$

$x = -\frac{3}{15}$

$x = -\frac{1}{5}$

Case 2: $5x+7$ is negative:

If $5x+7$ is negative, the equation becomes $3(-5x-7) = 18$.

Simplify this equation:

$-15x - 21 = 18$

$-15x = 18 + 21$

$-15x = 39$

$x = -\frac{39}{15}$

$x = -\frac{13}{5}$

So the solution for the equation $3|5x+7|=18$ is $x = -\frac{1}{5}$ and $x = -\frac{13}{5}$.