Find the value of x in (4^5⋅x+32^2)⋅2^5=2^16⋅x

Find the value of x in (45x+322)⋅25=216x

First we transform everything into powers of 2 as all the numbers involved in this equation are multiples of 2.

||    45 = (22)5 = 22*5= 210

||    32= (25)2 = 22*5= 210
dividing over 25 on both sides and putting the powers of 2 we get
210 x + 210 = 211x ------ 216/25 = 216-5 = 211

we factorise on the left hand side of the equation

210(x+1) = 211 x --------- we divide over 210

x+1 = 2x -------- 211/210 = 211-10 = 2

Take away x on both sides -----> x =1

LC

Related Maths A Level answers

All answers ▸

The equation " x^3-3x+1=0 " has three real roots. Show that one of the roots lies between −2 and −1


Differentiate with respect to x: y = ln(x^2+4*x+2).


4. The curve C has equation 4x^2 – y3 – 4xy + 2y = 0. P has coordinates (–2, 4) lies on C. (a) Find the exact value of d d y x at the point P. (6) The normal to C at P meets the y-axis at the point A. (b) Find the y coordinate of A


f(x) = x^3 + 3x^2 + 5. Find f'(x) and f''(x).