Algebraic Equations in One Variable

What is the first step to complete when solving this equation?
10 - 3y = 4

• Add 10

• Subtract 10

• Add 3

• Divide by -3

Solve for the variable. 3x=-27

• x=9

• x=-30

• x=-9

• x=-24

Solve for "x" ?
x-9=15

• 23

• 6

• 24

• 11

h/3=7

• 10

• 4

• 21

• 2.33

Ted bought a dolphin poster for $12.  He now has $5.  Write and solve a subtraction equation to find out how much money Ted took to the aquarium.

• m - 12 = 5

• m - 5 = 12

• m + 5 = 12

• m + 12 = 5

Translate:
Twelve less than a number

• 12 - x

• x - 12

• 12x

• x + 12

Write an equation for the word sentence:
The sum of a number and 4.5 is 8.2.

• 8.2=4.5n

• n+4.5=8.2

• 8.2n=4.5

• n-4.5=8.2

Write an equation for the word sentence:
Three times the cost is $24.

• 3c=24

• 24c=3

• c+3=24

• c-3=24

Determine whether the given value of the variable is a solution of the equation.
x - 24 = 58;  x = 82

• yes

• no

Solve the equation:
a + 2.4 = 7.8

• a = 10.2

• a = 5.4

• a = 17.76

• a = 3.25