<PRE><B>Question 1085622</B>
1) 3x + y = 3
2) 2x - y = 7
:
solve equation 1 for y
:
y = 3 - 3x
:
substitute for y in equation 2
:
2x - (3 - 3x) = 7
:
2x -3 + 3x = 7
:
5x = 10
:
x = 2
y = 3 - 3x = 3 - 3(2) = -3
:
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x = 2 and y = -3
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check answers by substituting for x and y in equations 1 and 2
:
1) 3(2) + (-3) = 3
3 = 3
:
2) 2(2) - (-3) = 7
7 = 7
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our answers check 
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