M Like terms, Variable on both sides, and multii-step Quiz

What is the first step to solving this equation:

9+2a=-3-4a

• move the variable to one side

  9+6a=3

• move the constant (numbers) to the same side

  12+2a=-4a

• solve for a

  a=-1

What is the next step?

9+2a=-3-4a

9+6a=-3

• -9 from both sides

• +3 to both sides

• +9 to both sides

• -3 to both sides

Tags

CCSS.6.EE.B.5

CCSS.6.EE.B.6

CCSS.6.EE.B.7

CCSS.6.EE.A.2

What is the next step?

9+2a=-3-4a

9+6a=-3

6a=-12

• multiply both sides by 6

• +12 to both sides

• divide both sides by 6

• -12 from both sides

What is the answer?

9+2a=-3-4a

9+6a=-3

6a=-12

• a=2

• a=-2

• a=-72

• a=-6

What is the first step

3x + 12 + 9x = 72

• Combine like terms

  12 & 72

• -12 from both sides

• combine like terms

  3x & 9x

• -72 from both sides

Tags

CCSS.7.EE.B.4A

What is the next step

3x + 12 + 9x = 72

12x+12=72

• divide by 12 on both sides

• -12 from both sides

• multiply by -12 to both sides

• +12 to both sides

Tags

CCSS.7.EE.B.4A

What is the next step

3x + 12 + 9x = 72

12x+12=72

12x=60

• divide by 12 on both sides

• divide by 60 on both sides

• -60 from both sides

• +12 to both sides

Tags

CCSS.7.EE.B.4A

3x + 12 + 9x = 72

• 5

• 6

• 7

• -7

Tags

CCSS.8.EE.C.7B

What is the first step

6(2n+5) = 66

• add 6 +2n

• • -5 from both sides

• -66 from both sides

• distribute the 6 doing 6x2n=12n and 6x5=30

Tags

CCSS.7.EE.B.4A

What is the next step

6(2n+5) = 66

12n+30=66

• +30 to both sides

• -66 from both sides

• Divide both sides by 12

• -30 from both sides

Tags

CCSS.7.EE.B.4A