Maths Modulus help please! QUICK
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1 <= |4x-13| <= 15
add 13 on all three sides,
1+13 <= 4x <= 15+13
14 <= 4x <= 28
dividing all the three sides by 4,
(14/4) <= x <= (28/4)
(7/2) <= x <= (14/2)
3.5 <= x <= 7
This means x is a number greater than or equal to 3.5 and less than or equal to 7
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