Transcript Adding/Subtracting Equations

Solving equations
by adding or
subtracting
Are the following numbers a solution
for the equation X – 7 = -13?
X=6
X = 10
X = -6
No….. It is not a
solution
6 – 7 = -1
10 – 7 = 3
No….. It is not a
solution
-6 – 7 = -13
Yes… this is the solution
M – 8 = - 14
+8 + 8
M=-6
6 + N = + 28
- 6
-6
N = 22
+ 15 = W + (-14)
+14
+ 14
29 = W
Y – (-7) = - 4
-7 -7
Y = - 11
A team of mountain climbers descended 3600
feet to a camp that was at an altitude of 12,035
feet. At what altitude did they start? Write and
solve and equation to determine the solution.
x – 3600 = 12,035
+3600 +3600
x = 15,635
4
5
7
9
12
13
15
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20
21
22
26
28
28
85
93
104
106
8465
-5
-6
-8
-10
-10
-10
-10
-19
-28
-31
-207
Answer
Bank
For
Solving
Equations
By
Adding
And
subtracting