solving multi step equations

2x - 3 + 4x = 27

TYPE IN ONLY THE NUMBER

5(2x+3)=45

TYPE IN ONLY THE NUMBER

12k + 15 -2k= 35

TYPE IN ONLY THE NUMBER

Solve:
 $38+7k=8(k+4)$  

• k = 6

• k = 8

• k = -6

• k = 1

 $-4x-7-3x+4=25$  

• -4

• -28

• -36

Solve

• -2/3

• 6

• -3

• -6

Solve:
 $5x-4+2x=3$  

• 1

• 2

• 3

• 4

What is the 2nd step in solving the following equation?

3x + 7 = x - 21

2x + 7 = -21

• Divide both sides by 2

• add 7 to both sides

• Subtract 7 from both sides

• Subtract 21 from both sides

Find the error in the problem below
19 - 2k = 3k - 1
     +3k   +3k
19 + 1k = -1
-19           -19
k = -20

• They should have divided by 1 for the last step
• They should add 19 instead of subtracting 19
• I can not find an error
• Instead of adding 3k they should subtract 3k