How do you solve 6x = 4x - ( - 18)?

3 Answers
Jun 9, 2018

x=9

Explanation:

Simplify first as follows:

6x=4x-(-18)

6x=4x+18-----> opening the bracket

6x-4x=4x-4x+18 -----> subtracting 4x both sides

2x=18

x=18/2

x=9

Checking the answer:

6(9) = 4(9) - (-18)

54 = 36+18 ----> Correct!

Jun 9, 2018

x=9

Explanation:

"note that "-(-18)=+18

6x=4x+18

"subtract "4x" from both sides"

2x=18

"divide both sides by 2"

x=18/2=9

color(blue)"As a check"

Substitute this value into the equation and if both sides are equal then it is the solution.

"left side "=6xx9=54

"right side "=(4xx9)+18=36+18=54

x=9" is the solution"

Jun 9, 2018

x = 9

Explanation:

6x color(red)(=) 4x - (-18) | you start with this

6x color(red)(=) 4x - (-18) | you put the '4x' on the other side
6x-4x color(red)(=) - ( -18)
2x color(red)(=) - ( -18)

2x color(red)(=) - ( -18) | -1 times -8
2x color(red)(=) -1 (-18)
2x color(red)(=) 18

2x color(red)(=) 18 | put the 2 to the other side
x color(red)(=) 18/2
x color(red)(=) 9