Question

o dobro de um numero somado com 12 e igual a 78,que numero e essse

Answer 1

$2x+12=78$

$2x=78-12$

$2x=66$

$x=\frac{66}{2}$

$x=33$

Answer 2

x×2+12=78
x×2=78-12
x×2=66
x=66÷2
x=33