Question

Two-thirds a number plus 4 is 7

Answer 1

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

Answer 2

The unknown number is 9/2.

Explanation:

Let the unknown number be x.

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

`(2)/(3)x+4=7`

Subtract 4 from both sides.

`(2)/(3)x+4-4=7-4`

`(2)/(3)x=3`

Multiply 3 on both sides.

`2x=9`

Divide both sides by 2.

`x=(9)/(2)`

Therefore the unknown number is 9/2.