Make r subject of the formula given that \(\frac{x}{r+a}=...
Make r subject of the formula given that xr+a=ar
a2(x−a)
a2(x+a)
ax−a
ax+a
Correct answer is A
xr+a=ar
⟹rx=ar+a2
rx−ra=a2⟹r=a2x−a
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