A(x+b)=4x+10
Sloving for b

b = ( 4x + 10 - ax)/a

Step-by-step explanation:

in order to solve for be , we will have to make b the subject of formulae

from the expression a(x+b)=4x+10.

a(x+b)=4x+10

we will open the bracket according to BODMAS rule

we have,

ax + ab = 4x + 10

collecte the like terms

ab = 4x + 10 - ax

divide both sides by a

ab/a = 4x + 10 - ax

b = ( 4x + 10 - ax)/a

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.