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Maths Puzzle
Numerical Ability
how do u simplify?
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They are asking me to describe a first step for solving each system using elimination. Then solve each system.
3x-y=21
2x+y=4
3x+4=-10
5x-2y=18
2x-y=6
-3x+4y=1
x-y=12
x+y=22
Sales reduction force a factory to cut back its output by 20%. By what percent must the reduced sales be increased to allow production to be brought back to normal?