Cheat sheet

Página 1

2x +5=11

__3

= 2x+5 x 3= 11x3

____3

= 2x +5-5=33-5

= 2x = 28

__ 2 ___2

x= 14

7x+6 -9= -12

_ 3

= 7x+6 -9+9=-12+9

-----3

=7x+ 6 x 3= -3 x 3

_ __3

= 7x + 6 - 6= -9 - 6

= 7x = -15

= 7x = -15

__7_____7

x= -15 or -2 1

_____7 ______ 7

*always get rid of the number thats by itself*

Whatever is done to one side has to be done to the other