Is It a Solution?
Is x = 4 a solution to 3x + 2 = 14?
Yes
Solve x + 9 = 15
x = 6
Solve 2x + 5 + x = 14
x = 3
Expand 3(x + 4)
3x + 12
Translate and solve: Five more than x is 17
x = 12
Is x = -2 a solution to 5x - 1 = -11?
No
Solve n - 12 = 8
n = 20
Solve 6y - 4 - 2y = 12
y = 4
Solve 2(x + 5) = 18
x = 4
Translate and solve: Twelve less than k is 9
k = 21
Is y = 6 a solution to y/2 + 1 = 4?
Yes
Solve 4p = 28
p = 7
Combine like terms: 7x - 3x + 8
4x + 8
Solve 4(x - 2) + 3x = 13
x = 3
A number multiplied by 6 equals 54. What is the number?
Is m = 3 a solution to 8m - 5 = 20?
No
Solve q/5 = -3
q = -15
Solve 10a - 3a + 9 = 30
a = 3
Expand -5(x + 2)
-5x - 10
Sam has 18 baseball cards. He buys some more and now has 31. How many did he buy?
13
What do you do to check whether a number is a solution to an equation?
Substitute it in and see if both sides are equal
Solve -7r = 56
r = -8
Solve 18 - 6 = 4b + 2b
b = 2
Solve -3(x - 1) + 6 = 15
x = -2
A gym charges $25 for a monthly fee plus $8 per class. If the total bill was $57, how many classes were taken?
4