Question 912734
Stop the whining with "Can you he'll me with this please, I got very confuse." 
Everyone here wants help.

(1.5+3)*x=42*1.5
4.5x=63
x=14

check
14*(3+1.5)=42*1.5
Notice that 14*3=42 and 4.5=3*1.5
14*4.5=42*1.5
63=63
ok