x + 1.4y = z
If you know that x = 1 and y = 2 what is the value of z?
z = 3.8
100
x + y = z
If you know that the value of x = 3/2 and y = 3/4 what is the value of z?
z = 9/4
100
Michael and Paul together have 19 pineapples. If Paul has 3 pineapples less than Michael, find the number of pineapples Michael has.
Michael has 11 pineapples.
100
5y + 2m = 10a
If you know the value of a is -2 and you know the value of y is 4. What is the value of m?
m = -20
200
-4y + 2x = z
If you know that y=2 and z=0
x=4
200
x + 2.1y = z
If you know that the value of y = 0.2 and z = 1.42 what is the value of x?
x=1
200
x + a = c
If you know that the value of x = 6/8 and a = 12/16 what is value of c?
c = 24/16 or 6/4 or 3/2
200
Stephanie had a pile of dimes and quarters that had a value of $6.75. If there were twice as many dimes as quarters, how many quarters did Stephanie have?
Stephaine has 15 quarters.
200
a² + b² = c²
If you know that a is 3 and b is 4 then what is the value of c?
c = 5
300
-6m/-3y= a
And if you know that m=3 and a= 2 what is y?
y=3
300
x * y = z
If you know that the value of x = 0.5 and y = 5.5 what is the value of z?
z = 2.75
300
k - a = r
If you know that k = 1/2 and a = 3/4 what is the value of r?
r = -1/4
300
The sum of two numbers is 2 and their difference is 10. Find the numbers.
6 and -4
300
When there is a fraction in an equation, what should you do?
Change it so that it is a decimal
400
-7k * 7r = i
If you know that k = 8 and r = 2 what is the value of i?
i= -784
400
x/y = z
If you know that the value of x is 2.5 and y = 0.5 what is the value of z?
z = 5
400
x*y = z
If the value of x = 16/4 and y = 1/2 what is the value of z?
z = 16/8 or 2
400
Theresa is 4 years older than Linda but 7 years younger than Charles. The sum of their ages is 51. How old is Charles?
(a) 16
(b) 22
(c) 23
(d) 25
(c) 23
400
9x - 3y = 6n
If you know that x is 4 and y is -4 what is the value of n?
n = 8
500
a² + 2ab + b² = c
If you know that a = -4 and b=2 what is the value of c?
c=4
500
k*2m = v
If you know that the value of k = 7.1 and m = 13.7 what is the value of v?
v = 194.54
500
x * 2y = z
If you know that the value of x = 12/3 and y = 1/2 what is the value of z?
z = 4
500
Carol is y years old and her daughter is 25 years younger.
Find Carol’s present age if the sum of their ages in 6 years’ time is 75 years
Carol is 44 years old
500
What is a variable?
A variable is a letter that substitutes an unknown value.