exam
Maths Puzzle
Numerical Ability
3x-4y=7
2x-y=3
then
3x-4y=7
-8x+4y=-12
adding
-5x=-5 then x=1 then 3-4y=7 then 4y=-4 then y=-1
Solution: x=1,y=-1
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exam Other Question
If the sides of a square are decreased by 3 cm, the area is decreased by 81cm^2. What were the dimensions of the original square?
I can not figure this out please help me. Thanks so much Place the following set of numbers in ascending order.
,5/9,1/8,,2/7