Question

1.se ×+5=12,entao ×é ingual a?
a.4
b.5
c.6
d.7
2.se 2×=10,×e ingal a
a.2
b.5
c.10
d.20​

Answer 1

$\large\boxed{\begin{array}{l} \sf{1) \: x + 5 = 12} \\ \\ \: \: \: \: \: \sf{x = 12 - 5} \\ \\ \: \: \: \boxed{ \boxed{\sf{x = 7}}} \leftarrow \textsf{Letra D} \\ \\ \sf{2) \: 2x = 10 } \\ \\ \: \: \: \: \: \sf{x = \dfrac{10}{2} } \\ \\ \: \: \boxed{ \boxed{ \sf{x = 5}}} \leftarrow \textsf{Letra B}\end{array}}$