Writing Equations
the sum of 6 and a number x is 14
6 + x = 14
or
x + 6 = 14
Sam has $40 after spending the day at the mall. At the mall she spent d dollars. Write an equation to represent the money she spent if she started with $200.
$200 = d + $40
or
d = $200 - $40
t - 4 = 3, t = ?
t = 7
d/5 = 6, d = ?
d = 30
-5 + -3
-8
the product of a number m and 4 is 20
4m = 20
A rectangle has a length of 4 inches and a width of w inches. Write an equation to find the area (A) of the rectangle.
A = 4w
h + 9 = 12, h = ?
h = 3
3y = 12, y = ?
y = 4
-50 / -5
10
the quotient of a number y and 7 is 63
y/7 = 63
A pizza cost $5. Additional toppings (t) cost $1 each. Write an equation that best represents the total cost (C) of a pizza?
C = $1t + $5
or
C = t + $5
w + 73 = 97, w = ?
w = 24
w/3 = 27, w = ?
w = 81
-67 + 92
25
4 less than a number w is 16
w - 4 = 16
It costs $200 to join a gym. The monthly fee (m) is $30. Write an equation best represents the total cost of a gym membership (C).
C = $30m + $200
x - 18 = 107, x = ?
x = 125
4w = 72, w = ?
w = 18
-82 - (-60)
-22
8 is the same as 5 less than a number x divide in half.
8 = x - 5 / 2
A cheese pizza costs $8. Additional toppings (t) cost $0.25 each. Write an equation best represents the total cost (c) of a pizza.
$0.25t + $8 = C
7 + g - 5 = 13, g = ?
g = 11
7m + 9 = 58, m = ?
m = 7
-73
-343