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Keegan Hendricks
Mathematics
9 April, 18:57
Solve the inequality. 7x - 9 > 2x + 6
+3
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Ahmed Newton
9 April, 19:16
0
x>3 is the answer
Step-by-step explanation:
We are given one inequality
7x-9>2x+6
To solve this we can do additions and subtraction as we do for equations.
Only for multiplication if negative number is used inequality changes
So let us add 9 to both the sides
7x>2x+6+9
Now subtract 2x from both the sides
7x-2x >15
5x>15
We divide by a positive number 5 without disturbing inequality sign.
X>3 is the answer
In interval notation we can write this as open interval
(3,∞)
In number line this is the region to the right of 3, not includig 3
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Aidan Wong
9 April, 19:16
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The value of x is greater than the value of 3.
We can treat inequalities like standard algebraic equations.
7x - 9 > 2x + 6
Add 9 to both sides.
7x > 2x + 15
Subtract 2x from both sides.
5x > 15
Divide both sides by 5.
x > 3
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