Best Answer

3x + 15y = 33

4x - 3y = 66

3x + 15y = 33 divide by 3 to both sides

x + 5y = 11 subtract 5y from both sides

x = 11 - 5y

4x - 3y = 66, replace x with 11- 5y

4(11 - 5y) - 3y = 66

44 - 20y - 3y = 66 subtract 44 from both sides

-23y = 22 divide by -23 to both sides

y = -22/23

x = 11 - 5y replace y with -22/23

x = 11 - 5(-22/23)

x = 11 + 110/23

x = (11*23 + 110)/23

x = 363/23

Q: What is the answer to 3x plus 15y equals 33 and 4x-3y equals 66 using the substitution method?

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