Question

se f(x)=7x-2,qual o valor de x para f (x)=5

Answer 1

$f(x)=7x-2$

$7x-2=5$

$7x=2+5$

$7x=7$

$x=\dfrac{7}{7}$

$x=1$

Answer 2

7x-2=5
7x=5+2
7x=7
X=7/7
X=1