x=4y+1 substitution, elemenation
sub the 2nd into the 1st. 2(4y+1) - 3y = 12 8y + 2 - 3y = 12 5y = 10 y = 2 sub into the 2nd x = 4(2) + 1 = 9 x = 9 , y = 2
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