exam Maths Puzzle Numerical Ability

2x/5-x/3=4

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exam Other Question

a farmer buys 100 animals for $100
chicks=10 cents each
pigs=$2 each
sheep=$5 each

how many of each does he buy
One more please. This is the hardest work I have ever had! Graph the inequality on a plane.
4x-3 is < than or equal to 7x+y Thanks so much for your help.