Week 11 Google Meet Quizizz

 $6x+9=4x-3$  

 $2x+9=-3$  

What move matches the first equation to the second?

   

•   Multiply both sides by  $\frac{1}{4}$  .

• Multiply both sides by -4.

•   Multiply both sides by  $-\frac{1}{4}$  .

•    Add -4x to both sides.

• Add -4 to both sides.

Answer explanation

*Remember, adding a negative is the same thing as subtracting a positive.

 $-4(5x-7)=-18$  

 $5x-7=4.5$  

What move matches the first equation to the second?

   

•   Multiply both sides by  $\frac{1}{4}$  .

• Multiply both sides by -4.

•   Multiply both sides by  $-\frac{1}{4}$  .

•    Add -4x to both sides.

• Add -4 to both sides.

Answer explanation

*Remember, dividing by a number is the same thing as multiplying by its reciprocal. 

 $8-10x=7+5x$  

 $4-10x=3+5x$  

What move matches the first equation to the second?

   

•   Multiply both sides by  $\frac{1}{4}$  .

• Multiply both sides by -4.

•   Multiply both sides by  $-\frac{1}{4}$  .

•    Add -4x to both sides.

• Add -4 to both sides.

 $-\frac{5x}{4}=4$  

 $5x=-16$  

What move matches the first equation to the second?

   

•   Multiply both sides by  $\frac{1}{4}$  .

• Multiply both sides by -4.

•   Multiply both sides by  $-\frac{1}{4}$  .

•    Add -4x to both sides.

• Add -4 to both sides.

 $12x+4=20x+24$  

 $3x+1=5x+6$  

What move matches the first equation to the second?

   

•   Multiply both sides by  $\frac{1}{4}$  .

• Multiply both sides by -4.

•   Multiply both sides by  $-\frac{1}{4}$  .

•    Add -4x to both sides.

• Add -4 to both sides.

Answer explanation

Remember, dividing by a number is the same thing as multiplying by its reciprocal. 

Where is the mistake in solving this equation?

• There is no mistake.

• In line two when they got 12. It should stay a 3.

• In line 6 when they got 5. They should have added -2 to both sides and got -8.

• In line 4. They added 6x on the left sided but subtracted 6x on the right side.

Which of these expressions is equivalent to 3(x-2)?

• 3x-6

• 3x-2

• 3x+2

• 3x+6

Which of these expressions is equivalent to-2(x-5)?

• -2x-5

• -2x+5

• -2x+10

• -2x-10

Combine like terms.

4x+3-2x-4

• 6x+7

• 6x-1

• 2x-1

• 2x+7

Write an equation for line l.

• y=4x

• y=x

• y=0x

• y=4