If you mean: 7x-53 = 9x
Then the solution is: x = -26.5
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10.8
7x53=371
9x + 2x + 26 is an expression, not an equation (or inequality). It therefore cannot have a solution so that its solution set is the null set. There is nothing in the solution set - no integers, rationals, irrationals: nothing!
All we have to do is subtract the coefficients of the x terms. The solution is -4x.
There is none because it's not an equation