x-9 + x+2 = 7
___ ___ __
6----- 5-------- 6
It looks wierd i wasnt sure how to set it up but these are all fractions. The underscore is the fraction line. its x-9 OVER 6 plus x+2 OVER 5 equals 7 OVER 6
Please show me how to do this problem!! I keep getting x=2 wich seems ok but it is wrong according to the books!!
2007-09-16 20:19:08 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
(x-9)/6 +(x+2)/5 = 7/6
clear the fractions and you get 5(x-9) + 6(x+2) = 35
5x - 45 + 6x +12 = 35 combine like terms you get:
11x - 33 = 35 solve for x
11x = 68
so x = 68/11
2007-09-16 20:32:03 · answer #1 · answered by Lollipop 5 · 0⤊ 0⤋
your denominator is 30 ------ 6 (5)
take 7/6 to the left hand side, and use denominator
5 (x - 9) + 6 (x + 2) - 5 (7) = 0
5x - 45 + 6x + 12 - 35 = 0
(11x -68)/ 30 = 0
x = 68 / 11
2007-09-16 20:33:00 · answer #2 · answered by 4 · 0⤊ 0⤋
Hi,
{5(x-9)+6(x+2)}/(6*5)=7/6
5x - 45 + 6x + 12 = 35
11x - 33 = 35
11x = 68
x=68/11 or 6.18
2007-09-16 21:31:05 · answer #3 · answered by iqbal 4 · 0⤊ 0⤋
Multiply both sides thru by 30 to clear the fractions and it should be straightforward. Sometimes the books answers --are-- wrong ☺
Doug
2007-09-16 20:25:22 · answer #4 · answered by doug_donaghue 7 · 0⤊ 0⤋