Whats the answer to this problem?
2007-10-16 09:48:30 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
7x + 3 = 15x + 9
3 = 8x + 9
-6 = 8x
x = -6/8 = -3/4
Answer: -3/4
2007-10-16 09:51:21 · answer #1 · answered by MathDude356 3 · 0⤊ 0⤋
7x+3=15x+9
-9+3=15x-7x combine like terms
-6=8x
______
8 8 divide both sides by 8
-6/8 = x
-3/4=x i simplified by dividing by 2
2007-10-16 16:53:23 · answer #2 · answered by chrissytimebuds 3 · 0⤊ 0⤋
7x+3=15x+9;
7x-15x =9-3 =6
-8x =6 or 8x =-6
x =-6/8 =-3/4 =-.75
2007-10-16 16:51:42 · answer #3 · answered by Any day 6 · 0⤊ 0⤋
solve for x. subtract 15x from 7x in order to bring the x's together. then subtract 3 from 9 in the same concept. you get
-8x = 6. now divide both sides by negative 8 and you have your answer.
2007-10-16 16:52:27 · answer #4 · answered by wicky034 2 · 0⤊ 0⤋
- 6 = 8x
x = - 6 / 8
x = - 3 / 4
2007-10-16 17:28:06 · answer #5 · answered by Como 7 · 0⤊ 0⤋