Equations and Variables

Solve.

• r = - 8/11

• r = -37/18

• r = 4

• r = -4

Solve.

• y = 27

• y = -9

• y = -1

• y = 1

Solve.

• 10 days

• 9 days

• 100 days

• never

Determine if the equation is IDENTITY or NO SOLUTION.

• no solution

• identity

In order to solve this equation, FIRST I would have to...
2y - 12 = 9

• add 12

• subtract 12

• divide by 2

• multiply by 2

In order to solve this equation, FIRST I would have to...
21 + 34x = 3x

• combine 21 and 34x on one side of the equation

• divide by 3

• subtract 3

• combine 34x and 3x on one side of the equation

In order to solve this equation, FIRST I would have to...
2(12 - 2x) = 6

• combine 12 and -2x

• distribute the 6

• distribute the 2

• combine the 2 and 6

If I subtract 2 from the left side of the equation, then I must...

• add 2 to the right side

• subtract 2 from the right side

• multiply 2 on the right side

• divide 2 on the right side

When solving this equation, I must FIRST...^(3x-2)/₄ = 12

• divide by 12

• multiply by 4

• divide by 3

• add 2

Any value of a variable which makes the equation true

• substitution

• solution

• inverse operation