Solving equations - level 3

Solve for the variable.

10x + 9 = 4x - 9

• x = 18

• x = 3

• x = -3

• x = -18

What is the first step to solve this equation?

3x + 6 = 10 + 3x + 4x 

• Add 4x to both sides of the equation

• Combine like terms 3x and 4x on the same side of the equation

• Add 3x and 6 to get 9x

• Add 6 and 10 to get 16

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

• Add the 2a and a 

• Add 4 to both sides

• Distribute +4 to the a and -5

• Distribute -4 to a and -5

3(x - 1) = 2x + 9

• Infinite Solutions

• No Solution

• x = 12

• x = -3

2(x + 6) + 3 = 9 + 5x

• 16
• 2
• -8
• -10

Solve: 2(4x - 3) - 8 = 4 + 2x

• 5/3
• 3
• 1
• 2

• 3x+16=x

Solve: 5x + 15 = 10x - 40

• x = 10

• x = -10

• x = 11

• x = -11

Solve:
7x - 3x - 8 = 24

• 8
• -8
• 3.2
• 4

What is the BEST FIRST STEP?
30 + 6t = 11t

• subtract 11t from both sides
• subtract 30 from both sides
• subtract 6t from both sides
• add 6t and 11t