En resumen

× + 2× + (2× - 20) = 100 5× - 20 = 100 5× = 100 + 20 5× = 120 × = 120÷5 × = 24.

Mejor respuesta

Alexaespin
2

× + 2× + (2× - 20) = 100

5× - 20 = 100

5× = 100 + 20

5× = 120

× = 120÷5

× = 24.