Question

The value of x in the expression 2x/3 - 7 = 5

is
A---8
B---24
C---18
D---36

Answer 1

`\\ \sf\longmapsto (2x)/(3)-7=5`

`\\ \sf\longmapsto (2x-21)/(3)=5`

`\\ \sf\longmapsto 2x-21=5(3)`

`\\ \sf\longmapsto 2x-21=15`

`\\ \sf\longmapsto 2x=15+21`

`\\ \sf\longmapsto 2x=36`

`\\ \sf\longmapsto x=(36)/(2)`

`\\ \sf\longmapsto x=18`

Answer 2

• C. 18

Explanation:

• 2x/3 - 7 = 5
• 2x/3 = 5 + 7
• 2x/3 = 12
• 2x = 3*12
• 2x = 36
• x = 36/2
• x = 18

Correct choice is C