Question

O conjunto verdade da equação 4 x + 2 = 20 – 2 x é:
( A ) 1
( B ) 5
( C ) 3
( D ) 0

Answer 1

$\large\boxed{\begin{array}{lr}4x + 2 = 20 - 2x \\ 4x + 2x = 20 - 2 \\ 6x = 18 \\ x = 18/6 \\ \boxed{x = 3} \\ \\ \boxed{ \blue{Alternativa \: (C) \: 3}}\end{array}}$