3 years ago

If 5x+3y=12 and 4x-5y=17, what is the value of y?

Mathematics

1 answer:

goblinko [34]3 years ago

5 0

Step-by-step explanation:

5x+3y = 12 ...1

4x-5y = 17 ...2

...1 × 5 both sides of the equation

25x + 15y = 60 ...3

...2 × 3 both sides of the equation

12x - 15y = 51 ...4

...3 + ...4

25x + 15y + 12x -15y = 60+51

37x = 111

x = 111/37 = 3

replace x = 3 in ...1

y = .......

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