A number plus 12 equals forty?

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Answer 1 · 2018-02-20T03:44:27

#28#

#x# is your unknown number, the one that you're trying to find

#x + 12 = 40#

Subtract #12# from both sides

#x = 28#

Answer 2 · 2018-02-20T03:45:30

28

Let the number required be #x#.

#x+12=40#
#x+12-12=40-12#
#x=40-12#

#x=28#