How do you do the problem 2l3x plus 7l-9 equals 25?

Answer 1

2l3x+7l-9=25 divide each side by 2

l3x+7l-9=12.5 add each side by 9

l3x+7l=21.5 since its absolute value there's two cases:

3x+7=21.5 solve for x: subtract 7 from both sides and divide by 3

x=4.833

and 3x+7=-21.5 solve for x: subtract 7 from both sides and divide by 3 again

x=-9.5

so x=4.833 or -9.5