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Anonymous
x+7 = 2x
2x = x+7
2x-x = 7
x = 7
Wiki User
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It is a linear equation in one variable, x.
If x=4 then 2x+7 =
-7 +2x = x + 8 2x - x = 7 + 8 x = 15
X=7
It equals 7 since 2x = 7+x where 2 has 2x but 7 is one x because there is only one x . So it is 7.
x = 3