Question

solve the equation x minus 15 equals to 25 and state which Euclid axiom do you use here

Answer 1

x-15=25 (given)
x-15+15=25+15 (equals are added to equals the wholes are equal)
x= 40 (as-15 and 15 get cancelled)

Answer 2

equals are added to equal the whole is equal
x-15 = 25
x -15 + 15 = 25 + 15
x = 40