Answer
a=3/2
b=1/2
Explanation:
let f(x)=ax+b
f(2x-3)=a(2x-3)+b
f(2x-3)=2ax-3a+b
3x-4=2ax-3a+b
3x=2ax
3=2a
b-3a=-4
b-3(3/2)=-4
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