Error Analysis identify the first step that contains an error.
Solve: -38 = 4x -2(x + 5)
Step 1: -38 = 4x - 2x -10
Step 2: -38 = 2x - 10
Step 3: -48 = 2x
Step 4: -24 = x

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Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?