2x-5>9x+702 = what do i do?
回答 (10)
2009-07-09 6:50 am
✔ 最佳答案
treat the greater than smbol like and equal sign and just solve it. only thing is, if you multiply or divide by a negative you have to flip the sign.subtract 2x on both sides
-5 > 7x +702 subtract 702 on both sides
-707 > 7x divide both sides by 7
-101 > x
2009-07-09 6:49 am
2x-5>9x+702
Subtract 2x from both sides:
-5 > 7x + 702
Subtract 702 from both sides:
-707 = 7x
Divide both sides by 7:
-101 > x <===Answer
Subtract 2x from both sides:
-5 > 7x + 702
Subtract 702 from both sides:
-707 = 7x
Divide both sides by 7:
-101 > x <===Answer
2009-07-09 8:39 am
2x - 5 > 9x + 702
2x - 9x > 5 + 702
-7x > 707
x < 707/(-7)
x < -101
2x - 9x > 5 + 702
-7x > 707
x < 707/(-7)
x < -101
2009-07-09 8:04 am
- 707 > 7x
x < - 101
x < - 101
2009-07-09 7:01 am
-7x>707
x<-101
======================
or
-707>7x
-101>x
x<-101
The same answer set.
x<-101
======================
or
-707>7x
-101>x
x<-101
The same answer set.
2009-07-09 6:53 am
2x-5>9x+702
is an inequality
so subtract both sides by 2x
2x-5>9x+702
-2x -2x
you get this
-5>7x+702
now subtract the 702 on both sides
now you have
-707>7x
now divide by 7 on both sides
you will get
-101>x
is an inequality
so subtract both sides by 2x
2x-5>9x+702
-2x -2x
you get this
-5>7x+702
now subtract the 702 on both sides
now you have
-707>7x
now divide by 7 on both sides
you will get
-101>x
2009-07-09 6:52 am
2x-5>9x+702 =>
2x-9x>702+5 =>
-7x>707 =>
x<707/7 =>
x<101
2x-9x>702+5 =>
-7x>707 =>
x<707/7 =>
x<101
2009-07-09 6:51 am
2x is 2 squared so it would be 4-5=-1
9x is 9 squared so its 81=702=783
and the > means that -1 is greater than 783 so its wrong it should be <
instead trust me!
9x is 9 squared so its 81=702=783
and the > means that -1 is greater than 783 so its wrong it should be <
instead trust me!
2009-07-09 6:50 am
bring all like terms to one side first so,
2x-9x>702+5
solve,
-7x>707
one rule with inequalities is that when you divide by a negative number you invert the sign(therefore, > turns to <)
so,
x<-101
2x-9x>702+5
solve,
-7x>707
one rule with inequalities is that when you divide by a negative number you invert the sign(therefore, > turns to <)
so,
x<-101
參考: My brain
2009-07-09 6:49 am
x < -101
good luck
good luck
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