Respuesta :

Makoto
if you put x for "a number,"
     2/3(x) + 4 = 7
     2x/3 = 7-4
     2x/3 = 3
          x = 2

Answer:

The unknown number is 9/2.

Step-by-step explanation:

Let the unknown number be x.

It is given that two-thirds a number plus 4 is 7.

[tex]\frac{2}{3}x+4=7[/tex]

Subtract 4 from both sides.

[tex]\frac{2}{3}x+4-4=7-4[/tex]

[tex]\frac{2}{3}x=3[/tex]

Multiply 3 on both sides.

[tex]2x=9[/tex]

Divide both sides by 2.

[tex]x=\frac{9}{2}[/tex]

Therefore the unknown number is 9/2.

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