Download Aim: How do we formally solve two-step equations?

Aim: How do we formally solve
two-step equations?
4x ̶ 5 = 23
+5
+5
Steps:
1) Eliminate “Loose Stuff”
(undo addition or subtraction)
Remember: Whatever you do to one side of the
4x = 28
equal sign,
must
do to the other
2) you
Undo
multiplication
or division
4
4
Remember: Whatever you do to one side of the
you must
do to the other
x = 7equal sign,
3) Write
Solution
Check:
4x ̶ 5 = 23
4 • 7 ̶ 5 = 23
28 ̶
5 = 23
23 = 23
Steps:
1) Rewrite equation
2) Substitute solution
in
for variable
3) Simplify