Is it an open circle? Is it extended to the left or the right? What number is it?
Solve for xx and graph the solution on the number line below.
minus, 21, is greater than or equal to, minus, 7, x
−21≥
−7x
Answer
Inequality Notation:
Number Line:
Click and drag to plot line.
-12
-10
-8
-6
-4
-2
0
2
4
6
8
10
12
The inequality is -21 ≥ -7x.
To solve for x, first divide both sides by -7:
-21 / -7 ≥ x
3 ≥ x
So x is less than or equal to 3.
On the number line, you would shade to the left starting at 3. The circle at 3 should be filled in since it is equal to 3.
Graph:
-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12
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