Find the value of x.
a) 3x + 1 = 2
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5 7
5 should be under 3x+1 and the 7 should be under 2
2007-10-19 15:47:42 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
OK
3x+1/5 = 2/7 ; ok lets get rid of the denominator of x by multiplying each side by 5
3x +1 = 10/7 ; of subtract 1 from both
3x = 10/7 -1 ; which is 7/7
3x =3/7
x = 1/7
Lets check to make sure
3(1/7) +1 /5 = 2/7 ??
(10/7)/5 = 2/7 ??
10/7 = 10/7 YES!!
Hope that helps.
2007-10-19 15:56:51 · answer #1 · answered by pyz01 7 · 0⤊ 0⤋
x = 1/7
2007-10-19 23:28:24 · answer #2 · answered by ??? 2 · 0⤊ 0⤋
x= 1/7
2007-10-19 23:00:03 · answer #3 · answered by Lo:) 1 · 0⤊ 0⤋
(3x+1)/5 = 2/7
- The first step is to multiply both sides by 5:
(5)(3x+1)/5) = (2/7)(5)
which gives you:
3x+ 1 = 10/7
- The next step is to subtract 1 from both sides:
3x + 1 - 1 = (10/7) - 1
which gives you:
3x = 3/7
- the last step is to solve for x by dividing each side by 3:
3x/3 = (3/7)/3
which gives you:
x = 1/7
2007-10-19 22:58:48 · answer #4 · answered by angeleyez000000 2 · 0⤊ 0⤋
(3x+1)/5 = 2/7
7(3x+1) = 10
21x + 7 = 10
21x = 3
x = 3/21 = 1/7
Doug
2007-10-19 22:54:46 · answer #5 · answered by doug_donaghue 7 · 0⤊ 0⤋
the equation may be rewritten as:
(3/5)x +(1/5) = (2/7)
first let's move the (1/5) over with (2/7) by subtraction:
(2/7) - (1/5) can be rewritten as:
(10/35) - (7/35) = (3/35)
so:
(3/5)x = (3/35)
now multiply either side by (5/3) to get x alone:
x = (1/7)
2007-10-19 22:56:54 · answer #6 · answered by wicky034 2 · 0⤊ 0⤋