Algebra Big Ideas

Solve the equation: 
x + 7 = 12

• x = 5

• x = 19

• x = -5

• x = 84

Solve the equation:
x - 3 = -12

• x = 9 

• x = -15

• x = -9

• x = 15

Solve the equation:
-5x = 25

• x = 20

• x = -20

• x = -5

• x = 5

Solve the equation:
1/2x = 6

• x = 12

• x = -12

• x = 3

• x = -3

What is the value of y in the solution to this system of equations? 3x - 5y = 22 y = -5x + 32

Mathematical Equivalence

ON

Joley is opening her first checking account as a teenager. She doesn’t have a job, so most of the income will be gifts from birthdays and holidays. Bank A has an $8 monthly charge. Bank B charges 1% of the balance. Which account balance below will result in Bank A being a better financial choice?​

• $850

• $550

• $650

• $750

Graph the solution to the system. The first equation has been plotted for you.

y = -3x-3

y= 4x +4

Solve:
3x + 7 = -8

• 5

• -5

• -12

• -18

Solve the equation. 
|m| + 2 = 11

• m = -9

• m = 9

• m = -13, 9

• m = 9, -9

Solve for x. 
z = xy

• x = z/y

• x = y/z

• x = yz

• y = xz