Solving Equations Simplifying Expressions

• -49
• 153/5
• 49
• 85

Solve by clearing the fractions first:

• x = -4

• x = 4

• x = 3

• x = -12

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4

• 2a + 2b + 4

• 8ab

• 4ab + 4

5(x - 3) + 2x = 27

• x = 3

• x = 42/15

• x = 30/7

• x = 6

3(x-6)+2x=22

• x=8

• x=2

• x=18

• x=3

2x - 3 + 4x = 27

• 12

• 4

• 5

• 15

Simplify the expression: 7(y + 3) - 2y.

Mathematical Equivalence

ON

What is the first step in solving the equation 2a - 4(a - 5) = 10

• Add 4 to both sides

• Add the 2a and a 

• Distribute 4 to a and -5

• Distribute -4 to a and -5

Find the Error
What error did the student make when solving the equation:
5x + 6 =  66
5x - 6 = 66 -6
5x = 60
5*5x= 60*5
x = 300

• The student subtracted 6 from both sides instead of adding

• Student multiplied by 5 instead of dividing by 5

• Student got the wrong answer when subtracting 66-6

• The student did not correctly eliminate the variable from one side of the equation