solving multi step equations

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

• Add 4 to both sides
• Add the 2a and a 
• Distribute 4 to a and -5
• Distribute -4 to a and -5

4(a + 3) = -32

• -11
• -44
• -20
• -8

Solve the equation:
3(x - 1) = 2x + 9

• x = 12
• no solution
• x = 10
• x = 6

Solve the equation:
3x - x + 2 = 4(2x - 1)

• infinite solutions
• x = 1
• x = -1
• no solution

Find the solution:
10 = 4x - 2

• x = 3
• x = 2
• x = -3
• x = -2

Solve:
3(3x - 6) = 18

• x = 4
• x = -4
• no solution
• infinite solutions