If 7X + 3 = 5X – 7, evaluate: 4 + 2X – 2.
You do not need to work out what x is!
evaluate: 4+2X-2 = 2X+2
7X+3=5X-7
2X+2+1=-7
2X+2=-8
2x=-10
x=-5
4+2x-2=2+2x=2+2*(-5)=2-10=-8
7x+3=5x-7
3+(-7) = -4
7x-5x=2x
2x=-4
x=-2
$${\mathtt{4}}{\mathtt{\,\small\textbf+\,}}{\mathtt{2}}{\mathtt{\,\times\,}}\left(-{\mathtt{2}}\right){\mathtt{\,-\,}}{\mathtt{2}} = -{\mathtt{2}}$$
+148 
