To solve for x, you need to isolate/get the variable "x" by itself in the formula:
ax + 5 = by - 10 Subtract 5 on both sides
ax + 5 - 5 = by - 10 - 5
ax = by - 15 Divide a on both sides to get x by itself
[tex]\frac{ax}{a} =\frac{by-15}{a}[/tex]
[tex]x=\frac{by-15}{a}[/tex] Your answer is B
