Question

7X - 9- 4(x - 1) = 28​

Answer 1

Respuesta:

Simplifying

7x + -9 + -4(x + -1) = 28

Reorder the terms:

7x + -9 + -4(-1 + x) = 28

7x + -9 + (-1 * -4 + x * -4) = 28

7x + -9 + (4 + -4x) = 28

Reorder the terms:

-9 + 4 + 7x + -4x = 28

Combine like terms: -9 + 4 = -5

-5 + 7x + -4x = 28

Combine like terms: 7x + -4x = 3x

-5 + 3x = 28

Solving

-5 + 3x = 28

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '5' to each side of the equation.

-5 + 5 + 3x = 28 + 5

Combine like terms: -5 + 5 = 0

0 + 3x = 28 + 5

3x = 28 + 5

Combine like terms: 28 + 5 = 33

3x = 33

Divide each side by '3'.

x = 11

Simplifying

x = 11

Explicación paso a paso: