Solving for a variable
Solve for x:
x + 5 = 12
x = 7
An expression for "five more than a number."
n + 5 or 5 + n
Evaluate x + 8
x = 4
12
Create an expression by putting the following values in a table first.
x:1,2,3
y:2,3,4
x+1
4 + 5 * 2
14
Solve for y:
3y = 24
y = 8
An expression for "three times a number, decreased by two.
3n-2
Evaluate 5m if m = 6
30
Create an expression by putting the following values in a table first.
x: 1, 2, 3
y: 2, 4, 6
2x
(10 - 2) ÷ 4
2
Solve for c: 5c + 2 = 27
Sarah has some apples. She buys 4 more and now has 15. Write the equation.
a + 4 = 15
evaluate 20 - 3p if p = 4
8
Create an expression by putting the following values in a table first.
Input x: 1, 2, 3
Output y: 5, 8, 11
3x + 2
30 ÷ (3 + 2) x 4
24
Solve for h: h / 2 + 6 = 14
h = 16
A gym charges a 20 dollar sign-up fee plus 15 dollars per month. Write an expression for the cost of m months.
15m + 20?
Evaluate 3x - y if x = 6 and y = 4
14
Create an expression by putting the following values in a table first.
x: 2, 4, 6
y: 9, 17, 25
4x + 1
8 + 4 x (10 - 6) ÷ 2
16
Solve for m: 20 = 4m - 4
m = 6
Sam is 4 years older than twice his brother's age. If his brother is b years old, write an expression for Sam's age.
2b + 4
20 - 2m + n
m = 4 and n = 7
19
Create an expression by putting the following values in a table first.
x: 0,1,2,3
y: 7,10,13,16
3x+7
(20 - 4 x 3) x (15 ÷ 3 + 2)
56