One-Step Equations
3.5 + b = 6.1
b = 2.6
4x + 3 = 7
x = 1
-2 = -7m + 6m
m = 2
4(6 + 5x) = 124
x = 5
You bought a magazine for $5 and ten erasers. You spent a total of $25. How much did each eraser cost?
Write and solve an equation.
25 = 10c + 5
c= $2 per eraser
n - 6.2 = 15.1
n = 21.3
2x - 5 = -11
x = -3
x + 1 - 3x = -5
x = 3
-108 = -8(x + 6) - 4
x = -7
331 students went on a field trip. Six buses were filled and 7 students traveled in cars. How many students were in each bus?
Write and solve an equation.
331 = 6s + 7
s = 54 students per bus
7.8h = 15.6
h = 2
(v/3) + 14 = 30
v = 48
9x + 11 -5x + 10 = -15
x = -9
-3(6x + 4) - 3 = 93
x = -6
Three brothers ages are consecutive even integers. The sum of their ages is 96. What are the ages of the three brothers?
30, 32, and 34
r/6 = 390
r = 2340
-x - 12 = 34
x = -46
29 = 4x + 1 - x + 10
x = 6
-168 = -7(-5 + 3x) -8x
x = -7
Four consecutive odd integers have a sum of -152. What are the four integers?
-41, -39, -37, -35
(2/3)x = 42
x = 63
(4/5)x + 22 = 14
x = -10
-3x - 7 + 2x + 9 = 5
x = -3
8x - (2x - 3) = 12
x = 3/2 or 1.5
Amy spent half her weekly allowance playing mini-golf. To earn more money, her parents let her wach the car for $4. What is her weekly allowance if she now has $12?
Write and solve an equation.
(1/2)x + 4 = 12
x = $16