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Solving Two-Step Equations

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by

Brooke Weaver

on 6 March 2014

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Transcript of Solving Two-Step Equations

Solving Two-Step Equations
By: Brooke & Lexi

Here is how we solved it:
64h-2.5=253.5 253.5
+2.5 +2.5 + 2.5
64h 256.0 256.0
64 64
Word Problem 1
Word Problem 2
Billy-Joe went to the store and bought 64 bottles of helium for a balloon party. For one bottle of helium it costs $2.50, and with each bottle you can fill up 253.5 balloons if he bought one bottle how much would it cost?
h=4
Today we are going to show you how to solve two-step equations. Solving two-step equations is rather easy
.
We will show you many different kinds of problems, then you will try one yourself.
First Problem
44c-30=58
Co-Efficient
Variable
constant
Total
+30
+30
44c 88
44 44
Billy-Jo's dad went to buy Billy-Jo some toys for his birthday. He has $27.00, each toy costs $7.00. He has a coupon for $6.00 off, how many toys can Billy-Jo's dad buy?
c=2
7t+6=27.00
-6 -6

7t 21
7 7
t=3
27.00
-6
21
L.C.
B.W.
35b-3=172
+3 +3
35b
35
175
35
172
+3
175
b=5
56y+15=239
56y
56
224
56
239
-56
224
y=4
-15 -15
So now you can try one yourself!
32k-11=181
k=?
This is how you were suppose to solve the problem.
32k-11=181
+11 +11

181

+11
192
32k
32
192
32
Co-efficient
k=6
This is how we solved it:
Total
Variable
Constant
Brooke's Word Problem
Now you can try a word problem by yourslef.
Lexi has 15 dollars if she needs 5 tickets to go to a LeBlanc Band Concert and if a ticket cost 5 dollars how many tickets can she buy?
Jack wants to buy roses for Valentines Day, he has $30.00. Each rose costs $2.00, Jack has a coupon that says "Buy one get one free", how many roses can Jack buy?
total
Co-Efficient
Constant
Total= $30.00
Constant= $2.00
Co-Efficient= "Buy one get one free"
5x-5=15
+5 +5
How to Solve Brooke's Word Problem
15
+5
20
1x + 2.00 = 30.00
5x
5
-2.00
-2.00
30.00
- 2.00
20
5
28.00
1x
1
x=4
=
28.00
L.C.
1
x = 28
Group Equation
Group
Group
Group
Group
Group
Group
Brooke's Second Individual Equation
Lexi's Individual Equation
30r-4=144
+4
+4
30r
30
144
+ 4
148
148
30
r=4
42x - 8= 244
+8
+8
244
+ 8
252
42x
42
=
252
42
x= 6
Full transcript