2х + Зу = 6, 3x + 5y = 15
Solve for x and y using substitution method.
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Step-by-step explanation:
Solve equation [2] for the variable y
[2] 5y = -3x + 15 [2] y = -3x/5 + 3
// Plug this in for variable y in equation [1]
[1] 2x + 3•(-3x/5+3) = 6 [1] x/5 = -3 [1] x = -15
// Solve equation [1] for the variable x
[1] x = - 15
// By now we know this much :
x = -15 y = -3x/5+3
// Use the x value to solve for y
y = -(3/5)(-15)+3 = 12
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