Verified Answer :

Captin

x = a number
x = 3


x + 4 ?   = 7    ,    7 - 4 = 3

x = 3   ,    4 + 3 = 7

x = 3

i hope this helps

crunchysamosa97

x+4=7
So subtract 4 from both sides which means to put minus four under the four and seven.For example x+4=7
                                                 -4  -4
Then cross out the two fours.
Afterwards do 7-4 
Which gives you 3 
So 3 is your number.

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