Question

in X+3(X+4)=20 you distribute the 3 to the x and 4 but what happens to that 3 afterwards

Answer 1

it is a linear simple equation, lets solve it step by step:
X + 3(X + 4) = 20
x + 3x + 3*4 = 20
4x + 12 = 20
4x = 20 - 12
4x = 8
x = 8/4
x = 2