For this case we have the following expression, we must find the value of the variable "x":
[tex]4x-3 (x-2) = 21[/tex]
We apply distributive property to the terms of the parenthesis taking into account that:
[tex]- * + = -\\- * - = +\\4x-3x + 6 = 21[/tex]
We add similar terms:
[tex]x + 6 = 21[/tex]
We subtract 6 on both sides of the equation:
[tex]x = 21-6\\x = 15[/tex]
Now, the value of x is 15
Answer:
[tex]x = 15[/tex]
