Question

7+x+2=3 y arriba del 3 un 2

Answer 1

7 + x + 2 = 3²
7 + x + 2 = 9
7 + x = 9 - 2
7 + x = 7
x = 7 - 7
x = 0

Comprobamos:
7 + x + 2 = 3²
7 + 0 + 2 = 9
9 = 9