Question

Make x the subject of the formula where x is positive: 5(x−2y)=2xz−u

A. x = 2xz - u/5 + 2y
B. x = 2xz - u/5 - 2y
C. x = u - 2xz/5 + 2y
D. x = u - 2xz/5 - 2y

Answer 1

Making x the subject, the equation becomes: x = 2xz - u/5 + 2y

Using the expression given;

• 5(x−2y)=2xz−u

opening the bracket ;

5x - 10y = 2xz - u

Add 10y to both sides to isolate 5x

5x = 2xz - u + 10y

divide both sides by 5 to isolate x

x = 2xz - u/5 + 2y

Hence, the equation is : x = 2xz - u/5 + 2y