4 x - 9 = - 5 x - 99 Add 5 x to both sides
4 x - 9 + 5 x = -5 x - 99 + 5
9 x - 9 = - 99 Add 9 to both sides
9 x - 9 + 9 = - 99 + 9
9 x = - 90 Divide both sides by 9
9 x / 9 = - 90 / 9
x = - 10
Proof:
4 x - 9 = - 5 x - 99
4 * ( - 10 ) - 9 = - 5 * ( - 10 ) - 99
- 40 - 9 = 50 - 99
- 49 = - 49
Help please!!!
4x-9=-5x-99???
3 answers
4 x - 9 = - 5 x - 99 Add 5 x to both sides
4 x - 9 + 5 x = - 5 x - 99 + 5 x
4 x - 9 + 5 x = - 5 x - 99 + 5 x
Thank you so much, my hw is all mixed equations so yeah.