Solve the equation. Check the solution.
7/8x - 9/10 = -1/8
2007-01-03 16:19:10 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
ditto
2007-01-03 16:25:01 · answer #1 · answered by msvietpig 3 · 0⤊ 1⤋
Multiply both sides by 40 to get rid of the fractions:
40(7/8x-9/10)=40(-1/8)
35x-36=-5
Add 36 from both sides:
35x=31
Divide 35 from both sides:
x=31/35
Check:
7/8(31/35)-9/10=-1/8
31/40-9/10=-1/8
31/40-36/40=-1/8
-5/40=-1/8
-1/8=-1/8
2007-01-04 00:48:40 · answer #2 · answered by Anonymous · 0⤊ 1⤋
a. Eliminate fractions > multiply the denominators by everything:
(8)(10)(x)(7/8x) - (8)(10)(x)(9/10) = (8)(10)(x)
First: cancel "like" terms > combine remaining terms >
(10)(7) - (8)(x)(9) = (8)(10)(x)
70 - 72x = 80x
Sec: solve for "x" and keep it on one side > add 72x to both sides:
70 - 72x + 72x = 80x + 72x
70 = 152x
Third: divide both sides by 152x >
70/152 = 152x/152
70/152 = x; x = 70/152
Simplify 70/152, if possible.
2007-01-04 00:28:32 · answer #3 · answered by ♪♥Annie♥♪ 6 · 1⤊ 2⤋
Use the same technique as on the question you asked a half hour ago.
* * * * *
Better check your work there, tutor (three posts down).
2007-01-04 00:22:22 · answer #4 · answered by Anonymous · 3⤊ 0⤋
0.885
2007-01-04 00:24:36 · answer #5 · answered by np200012 2 · 1⤊ 1⤋