Question

A equaçao 3(x-a)= x +4 +3a de incognita x e chamada equaçao literal mostre que o valor de x em funçao de a e x= 3a +2

Answer 1

3(x-a) = x + 4 + 3a
3x - 3a = x + 4 + 3a
3x - x = 3a + 3a + 4
2x = 6a + 4 x
x = 6a + 4
           2
x = 3a +2

Answer 2

$3(x-a)=x+4+3a\\\\ 3x-3a=x+4+3a\\\\ 3x-x=4+3a+3a\\\\ 2x=4+6a\\\\ 2x=2(2+3a)\\\\ x=\dfrac{2(2+3a)}{2}\\\\ x=3a+2~~\blacksquare$