Question

x-y= 4/3
3x+5/3=7y+3

Answer 1

3x-7x=3-5/3
4x=9/3-5/3
4x=4/3
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{x-y=4/3 ----->x=4/3+y
{4x=4/3
4(4/3+y)=4/3
16/3+4y=4/3
16+12y=4
12y=-12
y=-1
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x=4/3+y
x=4/3-1
x=4-3
x=1
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(1,-1)