the sum of means (___+____) so you will need to open parentheses after the 2 times.
2*(7+x) is the expression you are looking for.
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Find out what X is first. You can't answer that without an equation.
The answer is 7. The equation is x+14=21, so you would find x by doing 21-14=7 x=7
2x + 7 = 33 2x = 33 - 7 2x = 26 X = 26/2 X = 13
tHERE IS NO DIRECT WAY TO FINDS OUT THIOS MATHEMATICAL EQUATION!
x+4.