Question

considerando a função p(x)=3x-1 e 9(x)=7-x para qual valor de x termos p(x)=9(x)?

Answer 1

p(X)=3x-1
9(X)=7-x
3x-1=7-x
3x+x-1=7
4x=7+1
4x=8
x=8/4
x=2