F2 MATHS

(A+B)x-A=-2x-1

Ax+Bx-A=-2x-1

By comparing like terms,

-A=-1, Ax+Bx=-2x
A= 1 A+B=-2
1+B=-2
B=-2-1
B=-3

A = 1
A+B = -2
1+B = -2
B = -3