Question

×-12=45 ma ajuta cnv cu
Rasp

Answer 1

x-12=45 |+12
x=45+12
x=57

S={57}

Answer 2

$x \: - \: 12 = 45 \Leftrightarrow \\ x = 45 \: + \: 12 \Leftrightarrow \\ x = 57$