We have:
[tex]-7.7=-1.3+\frac{x}{4}[/tex]The first thing to do is passing the term -1.3 from the right side of the equation to the left side as a positive number:
[tex]-7.7+1.3=-6.4=\frac{x}{4}[/tex]The next step involves multiplying the 4 in the left side:
[tex]\begin{gathered} -6.4=\frac{x}{4} \\ -6.4\cdot4=x \\ x=-25.6 \end{gathered}[/tex]
