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What is the answer to 3x plus 15y equals 33 and 4x-3y equals 66 using the substitution method?
Wiki User
∙ 13y ago
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
Wiki User
∙ 13y ago
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What is the answer to 4x3y 44 and x y-3?
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