Chapter 73 Modeling 2x 3 11 Each one has 4 squares so 4 is your answer Solving 2Step Equations Algebraic equations are solved backwards so do the OPPOSITE math Since there are more than 1 steps to do you must follow the Order of Operationsbut BACKWARDS ID: 465737
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Slide1
Solving 2-step equations
Chapter 7.3Slide2
Modeling - 2x + 3 = 11
=
Each one has 4 squares, so 4 is your answer!Slide3
Solving 2-Step Equations
Algebraic equations are solved backwards, so do the OPPOSITE math!
Since there are more than 1 steps to do you must follow the Order of Operations…but BACKWARDS!!!
Add/Subtract 1
st
Multiply/Divide 2
nd
Slide4
3y – 8 = 7
+ 8 +8
3y = 15
/3 /3
y = 5
1
st
ADD 8 to both sides so he cancels out!
2
nd
DIVIDE by 3 to both sides so he cancels out!
Now the y is alone and you can plug the answer back in to CHECK your work!Slide5
9 + 6b = 51
-9 -9
6b = 42
/6 /6
b = 7
1
st
SUBTRACT 9 to both sides so he cancels out!
2
nd
DIVIDE by 6 to both sides so he cancels out!
Now the y is alone and you can plug the answer back in to CHECK your work!Slide6
y/2 + 2 = 10
-2 -2
y/2 = 8
x 2 x 2
y = 16
1
st
SUBTRACT 2 to both sides so he cancels out!
2
nd
MULTIPLY by 2 to both sides so he cancels out!
Now the y is alone and you can plug the answer back in to CHECK your work!Slide7
1.8 + 7s = 15.8
-1.8 - 1.8
7s = 14.0
/ 7 / 7
s = 2
1
st
SUBTRACT 1.8 from both sides so he cancels out!
2
nd
DIVIDE by 7 to both sides so he cancels out!
Now the y is alone and you can plug the answer back in to CHECK your work!