Answer:
x = [tex]\frac{2T}{nd}[/tex] - a
Step-by-step explanation:
Multiply both sides by 2 to eliminate the fraction
2T = n(a + x)d
Since n and d are both multipliers, divide both sides by nd
[tex]\frac{2T}{nd}[/tex] = a + x
Isolate x by subtracting a from both sides, hence
x = [tex]\frac{2T}{nd}[/tex] - a
