Addition
r + 12 = 25
r + 12 = 25
-12 = -12
r = 13
19 = j - 5
19 = j - 5
+5 = +5
j = 24
What is the inverse operation of subtraction?
Addition
Find the mistake:
z + 36 = 57
+ 36 =+36
z = 93
Instead of adding 36 on both sides, we should have subtracted 36 on both sides.
32 = c + 20
32 = c +20
-20 = -20
c = 12
w - 43 = 15
w - 43 = 15
+43 = +43
w = 58
When solving one step equations, how will I verify if my answer is correct?
Subtitution (by substituting the vaule of the varible back in to the original equation).
y + 1/2 = 1/2
y + 1/2 = 1/2
-1/2 = -1/2
y = 0
11 + n = 11
11 + n = 11
-11 = -11
n = 0
x - 31 = 64
x - 31 = 64
+31 = +31
x = 95
What is the difference between an expression and an equation?
An expression is a mathematical phrase that does not contain an equal sign; however, an equation is a mathematical sentence that contains an equal sign
y - 15 = 5.8
y - 15 = 5.8
+15 = +15
y = 20.8
70 = 11 + k
70 = 11 + k
-11 = -11
k = 59
x - 95 = 57
x - 95 = 57
+95 = +95
x = 152
What would you do to isolate the variable?
-20.9 = b - 3.4
Add 3.4 on the right side of the equation
Last week, Perry ran 30 miles more than DeShawn. Perry ran 46 miles. Use the equation d + 30 = 46 to find how many miles DeShawn ran.
d + 30 = 46
- 30 = - 30
d = 16
x + 645 = 1248
x + 645 = 1248
-645 = -645
x = 603
1036 = y - 581
1036 = y - 581
+581 = +581
y = 1617
What are the step in solving one step equations?
93.4 = x + 91.5
93.4 = x + 91.5
-91.5 = -91.5
x = 1.9