4-1
Substitute each value of the variable to find which, if any, is a solution:
7+d=22
d=13, 14, 15, 16
d=15
Which property of equality is used?
2m=10
2m+3=10+3
Addition Property of Equality
Solve the equation: x+3=5
x=2
Solve the equation:
2x=8
x=4
Substitute each value of the variable to find which, if any, is a solution:
12=96/x
x=8, 15, 1152
x=8
Which property of equality is used?
5m - 4=19
5m - 4 - 1=19 - 1
Subtraction Property of Equality
Solve the equation:
10=x - 15
x=25
Solve the equation:
15= m/4
m=60
Substitute each value of the variable to find which, if any, is a solution:
13m=95
m= 5, 6, 7, 8
No solution
If 6s=24, does 6s/6=24/6 ?
Yes or no? Explain
(/ means divided)
Yes because both sides of the equation are divided by the same number
Solve the equation:
m-215=389
m=604
Solve the equation:
h/3=210
h=630
Substitute each value of the variable to find which, if any, is a solution:
5.2 - x = 1.8
x= 2.4, 3.2, 3.4, 3.6
x=3.4
If r+9=42, does r+9-9=42+9?
Yes or no? Explain
No, because one side is being subtracted by 9 and the other is being added by 9
Solve the equation:
12.85= x - 4.34
x=17.19
Solve the equation:
2/7x=3
x=10 1/2
Substitute each value of the variable to find which, if any, is a solution:
u+8.3=22.342
u= 13.281, 13.491, 13.749, 14.042
u=14.042
Fill in the blank:
15+___=6+10+33
34
2 2/3 +y = 4 1/4
y= 1 7/12
Solve the equation:
k/9= 9 1/2
k=81 3/4