Question

What is −5x+4y=3
x=2y−15
​

Answer 1

x = 9

y = 12

Explanation:

Answer 2

x=9

y=12

Explanation:

you know what the value of x is in terms of the second equation

so put that value into the first equation

so

-5(2y-15) + 4y = 3

-10y + 75 + 4y = 3

-6y + 75 = 3

-6y = -72

y = 12 (now we have the actual value of y, just substitute this into any of the first two original functions)

x = 2(12) - 15

x = 24 - 15

x = 9