Algebra usually involves replacing numbers with letters and learning ways to solve equations and formulae.
First, we must find x.
3y + 67 = x <-----------There it is!
These topics are for GCSE Maths Level.
This theme covers; Expressions, Sequences, nth Term, Index Laws, Equations, Linears, Gradients, Quadratics, Rearranging and Simultaneous Equations.