exam
Maths Puzzle
Numerical Ability
solve the inequality
5q+7<3(q+1)
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exam Other Question
1/xy / 1/x+1/y
I am having trouble solving these systems. I get lost somewhere in the middle and it becomes a mess. Please help.
x-2y-3z=4
2x-4y+5z=-3
5x-6y+4z=-7
and
2x-y=-1
-2x+z=1
y-z=0
Thank you.