Question

10. Na equação: 3x - 18 = x + 2, o valor de xé:
a) 10
b) 12
c) 14
d) 18​

Answer 1

→ Cálculo :

$\\{{\boxed{\begin{array}{lr}{3x-18=x+2} \\ \\{3x-x=2+18 }\\\\{2x=20}\\\\{x=\frac{20}{2} }\\\\\boxed{\red{ x=10 }} \\ \\{\rm{O \ valor \ de \ X \ ={\boxed{\red{10}}}}}\end{array}}}}$

Alternativa correta Letra A