solve 2^(3x+1)=16

The first step is to make sure that everything has the same base, so you can equate the powers. For example if you have an equation 22 = 2x you know that x must equal 2. So with this question you can rewrite 16 as 2^4, and then equate the powers. So you get the new equation: 3x+1 = 4, then just rearrange to get x. So 3x = 4-1 so 3x=3 then divide both sides by 3 to get x=1.So the general way to solve questions like this is to: 1. change the bases so they are all the same 2. equate the powers

JP

Related Maths GCSE answers

All answers ▸

Solve the following pair of simultaneous equations: 1. 3x + 2y = 9 2. 6x + 5y = 21


Find the median, mean, and mode of the following set of data: 55, 43, 62, 91, 2, 43, 34, 16, 16.


(x+3)(x-4)(x+5) is identical to x^3 +ax^2 -17x+b. Find the value of a and the value of b.


Express 112 as a product of it's prime factors.