solve equations quiz

What is the first step in solving this equation:
5x + 7 = 12

• Divide by 5
• Subtract 5
• Multiply by 7
• Subtract 7

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

The steps in solving 5b - 6 = 24 are: 

• Add 6 to both sides and divide both sides by 5
• Add 6 to both sides and multiply both sides by 5
• Subtract 6 from both sides then multiply both sides by 5
• Subtract 6 from both sides then divide both sides by 5

Solve for x:
8x - 10 = -34

• 4
• 3
• -3
• -24

10x = 90

• x = 80
• x = 100
• x = 10
• x = 9

What is the opposite operation of addition?

• addition

• subtraction

• multiplication

• division

2y+5=17

• y=16

• y=1

• y=6

• y=24

What are the constants of the following? 
2x-4+3x+5

• 2,3
• -4, 5
• -4, -5
• 4, 5

Solve the equation:
-5x = 25

• x = 20
• x = -20
• x = -5
• x = 5

Evaluate the expression:

2(a - 3) + 5b

when a = 7, b = 2

• -4

• -2

• 18

• 30