I don't know how to solve
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4x-7 >= 1
add 7 to both sides(you can think of it as if you take 7 to the other side and change its sign. This way of thinking will make you faster)
(*4x >=1+7 ( you can write this quickly if you think of taking 7 to the other side and change its sign))
so you will have
4x >= 8
then divide both sides by 4
x >= 2
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