Answer :
[tex]\begin{gathered} y=2x+a \\ y=bx-3 \\ \text{lets} \\ \text{try } \\ a=3 \\ b=2 \\ y=2x+3 \\ y=2x-3 \\ y=6 \\ 6=2x-3 \\ 9=2x \\ x=4.5 \\ \end{gathered}[/tex]
a = 3 and b = 2 is a solution.
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