To solve this system of equations, we can first solve the first equation for x in terms of y:
x = 15 - 3y
Next, substitute this expression for x into the second equation:
3(15 - 3y) + 2y = 10
45 - 9y + 2y = 10
45 - 7y = 10
-7y = -35
y = 5
Therefore, y = 5.
{x+3y=15
{3x+2y=10
y=?
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