Question

6x+9=18 if x satifies the equation what if the value of 2x+3

Answer 1

`\implies{6x + 9 = 18} \\ \implies{6x = 18 - 9} \\ \implies{6x = 9} \\ \\ \implies{x = (9)/(6) } \\ \\ \implies{x = (3)/(2) }`

Now put x = 3/2 in 2x + 3 we get,

`\implies{2x + 3} \\ \implies{2( (3)/(2) ) + 3} \\ \implies{3 + 3} \\ \\ \implies{6}`

Answer 2

9

Explanation:

6x + 9 = 18

To find x, subtract 9 from both sides

6x + 9 - 9 = 18 - 9

6x = 18

divided both sides by 6

6x/6 = 18/6

x = 3

where we plug in x into 2x+3

2(3) + 3 = 6 + 3 = 9