If the first step in the solution of the equation -x + 6 = 5 - 3x is "subtract 5," then what should the next step be? add 3x add x subtract 6

Which equation represents the model shown? a)1/3 divide 1/6 = 2 b)2/3 divide 1/6 = 2/18 c)1/3 divide 1/6 = 1/18 d)2/3 divide 1/6 =4

What is the value of x when x + 7 = 21?

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?