two thirds a number plus 4 is 7
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It would be: 2x+4 = 19
its an equation like this x squared plus 4 equals 7 or a number you dont know times itsself plus 4 is 7. What is the number you dont know
You would add 4.
There is no variable, and the equation is not valid.
It would be: 2x+4 = 19 and the value of x works out as 7.5