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# Solving 2-Step Equations

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by

## Christi Jenkins

on 28 October 2014

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#### Transcript of Solving 2-Step Equations

+ 12 = 252
Solving 2-Step Equations
3y + 12 = 252

Goal:
Isolate the variable
3y + 12 = 252
Goal:
Isolate the variable
3y + 12 = 252
Use Inverse Operations
Multiply when equation divides
Divide when equation multiplies
-12
-12
Goal:
Isolate the variable
Simplify
Combine like terms
Remember order of operations:
P
lease
E
xcuse
M
y
D
ear
A
unt
S
ally
P
arenthesis
E
xponent
M
ultiply
D
ivide
A
dd
S
ubtract

3y + 12 = 252
-12
-12
3y + 0 = 240
Goal:
Isolate the variable
3y = 240
Use Inverse Operations
again
/3
/3
Goal:
Isolate the variable
3y = 240
Simplify
again
/3
/3
y = 80
Check:
Use Substitution
3y + 12 = 252
3(
80
) + 12 = 252
Check:
Use Substitution
Simplify
Combine like terms
Remember order of operations:
P
lease
E
xcuse
M
y
D
ear
A
unt
S
ally
P
arenthesis
E
xponent
M
ultiply
D
ivide
A
dd
S
ubtract

3(80) + 12 = 252
240
+ 12 = 252
Check:
Use Substitution
Simplify
again
Combine like terms
Remember order of operations:
P
lease
E
xcuse
M
y
D
ear
A
unt
S
ally
P
arenthesis
E
xponent
M
ultiply
D
ivide
A
dd
S
ubtract

3(80) + 12 = 252
240
252
= 252
Full transcript