Solve 7(x-1)=-21 for x

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justaguide's profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted on

The equation 7(x-1)=-21 has to be solved for x

7(x-1)=-21

=> x - 1 = -3

=> x = -3 + 1

=> x = -2

The solution of the equation is x = -2

nmmoritz's profile pic

nmmoritz | Middle School Teacher | (Level 1) Adjunct Educator

Posted on

I have a tendency to love to use the distributive property, so I will show you how to find the answer by doing so.

7(x-1) = -21

7x-7 = -21

7x = -14

x = -2

As you can see, you arrive at the same answer, and I don't think it's necessarily any more work.

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