We are given the following equation
[tex]5x+30=90[/tex]Let us solve this equation for x.
Step 1:
Subtract 30 from both sides of the equation (so that 30 on the left side cancels out)
[tex]\begin{gathered} 5x+30-30=90-30 \\ 5x=60 \end{gathered}[/tex]Step 2:
Divide both sides of the equation by 5 (so that 5 on the left side cancels out)
[tex]\begin{gathered} \frac{5x}{5}=\frac{60}{5} \\ x=12 \end{gathered}[/tex]Therefore, the value of x is 12