If 10x + 21 ≥ 7 + 3x ≥ 9x –
10; find x.
Solution
10x + 42 ≥ 7 + 3x and 7 +
3x ≥ 9x - 29
10x – 3x ≤ 7 - 42 and 7 +29
≤ 9x - 3x
7x ≤ -35 and 36 ≤ 6x
7x ≤ -35 and 36
≤ 6x
7 7 6 6
x ≤ -5 and 6 ≤ x
x ≤ -5 and x ≥ 6
TRY THIS…………….
If 10x - 63 ≥ 7 + 3x ≥ 9x –
65; find x
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