Question

Twice the quantity of the sum of a number and three is equivalent to seven less than three times the number. Write an equation and find the number.​

Answer 1

x = 13

Explanation:

2( x + 3 ) = 3x - 7

2x + 6 = 3x - 7

2x = 3x - 7 - 6

2x = 3x - 13

2x - 3x = -13

-x = -13

`(-x)/(-1)` =
`(-13)/(-1)`

x = 13

CHECK:

2( x + 3 ) = 3x - 7

2( 13 + 3 ) = 3( 13 ) - 7

2( 16 ) = 39 - 7

32 = 32