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[tex]Expand -2\left(x+13\right)+9x:\quad 7x-26\\Expand -2\left(x+13\right):\quad -2x-26\\\\=-2x-26+9x\\Simplify -2x-26+9x:\quad 7x-26\\7x-26=4\\\mathrm{Add\:}26\mathrm{\:to\:both\:sides}\\7x-26+26=4+26\\\mathrm{Simplify}\\7x=30\\\\\mathrm{Divide\:both\:sides\:by\:}7\\\frac{7x}{7}=\frac{30}{7}\\Simplify\\x=\frac{30}{7}[/tex]

The value of x for the expression −2(x+13)+9x=4 ​is ( 30 / 7).

What is an expression?

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

The given expression will be solved as:-

−2(x+13)+9x=4 ​

-2x - 26 + 9x = 4

7x -26 = 4

7x = 30

x = ( 30 / 7 ).

Hence, the value of the expression is ( 30 / 7 ).

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