Solve: 2(2 x + 9) = 5 x + 72 which step is wrongstep 1: 4 x + 18 = 5 x + 72 step 2: 9 x + 18 = 72 step 3: 9 x = 54 step 4: x = 6

Step 2 is wrong because they combined like terms incorrectly.  The equation should be:  18 = x + 72.  Then, in Step 3, you would get x = -54.

Step-by-step explanation:

The given equation is a multi-step equation involving the distributive property.  You would first complete the distributive property by multiplying each term inside the parenthesis by the outside term.  Step 1 of the problem completes this step correctly.  The next step in the problem would be to use inverse operations to combine like terms and isolate the variable - whatever you do to one side of the equation, you must do to the other.  In this case, we need to subtract 4x from both sides, not add, to get:  4x - 4x + 18 = 5x - 4x + 72.  This gives us 18 = x + 72.  To solve for x, we need to subtract both sides by 72:  18 - 72 = x + 72 - 72, or x = -54.

john earns $14.00 for two hours of work.

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right