I'm going to assume that you want us to figure out what the number is for you.
You said:** 2x + 5 = 45**
Subtract 5 from each side:
2x = 40
Divide each side by 2 :
x = 20
the answer is 20 which I calculated from the equation of 2x+5=45
The unknown number is found by solving the equation 2 x + 5 = 45 to yield x = 20 .
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Materi : Akar dan Pangkat√50 + 2√18= √[2.25] + 2√[2.9]= 5√2 + 6√2= 11√2---Semoga bisa membantu [tex] \boxed{ \colorbox{darkblue}{ \sf{ \color{lightblue}{ answered\:by\:BLUEBRAXGEOMETRY}}}} [/tex]