Question

Ax+b=3(x-a) solve for x

Answer 1

Ax + b = 3x -3a
Ax- 3x = -(3a+b)
x(A-3) = - (3a+b)
x = - (3a+b) / (A-3)

Answer 2

Apply the distributive property.
ax+b=3(x)+3(−a)

Multiply 3 by x to get 3x.
ax+b=3x+3(−a)

Move −1. 
ax+b=−1⋅3a 

Multiply −1 by 3 to get −3. 
ax+b=−3a 

Replace back in to larger expression. 
ax+b=3x−3a 

Since 3x contains the variable to solve for, move it to the left-hand side of the equation by subtracting 3x from both sides.
ax+b−3x=−3a

Factor out the GCF of x from each term in the polynomial.
x(a)+x(−3)=−b−3a

Factor out the GCF of x from ax−3x.
x(a−3)=−b−3a

Divide each term in the equation by (a−3).
x=−3a+b/a−3


Answer:
x=−3a+b/a−3