Question

o dobro de um numero sbtraido de 20 é igual a 100, qual é o numero ?​

Answer 1

2x-20=100
2x=100+20
2x=120
x=120/2
x=60

Answer 2

$\large\boxed{\begin{array}{l} \sf{Um\, n\acute{u}mero \rightarrow{x}} \\ \underline{ \sf{Dobro\,de\,um\, n\acute{u}mero \rightarrow{2x}}} \\ \sf{2x - 20 = 100} \\ \sf{2x = 100 + 20} \\ \sf{2x = 120} \\ \sf{x= \dfrac{120}{2} } \\ \huge\boxed{\boxed{\boxed{\boxed{\sf{x = 60}}}}}\end{array}}$