f(x)=4x-5;g(x)=6x-3 find 3f(x)-2g(x)
we have that
3f(x)=3(4x-5)=12x-15
and
2g(x)=2(6x-3)=12x-6
so
3f(x)-2g(x)=(12x-15)-(12x-6)=-15+6=-9
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