how do u solve this y/2+7=-20-5

Question

it is a muli-step equation.it has more than 2 steps.

Answer 1

y/2+7=-20-5

 

y/2+7=-25

 

y/2=-32

 

y=-64

Answer 2

I would start by thinking how to get the variable by itself. We have one equation and one unknown. Thus, there is a solution.

y/2 + 7 = -20 - 5
y/2 = -20 - 5 - 7

y/2 = -32
y = -32 * 2

y = -64

 

You can always check your answers to confirm.

 

(-64)/2 + 7 = -20 - 5

-32 + 7 = -20 - 5

-25 = -25

 

And so y = -64 is correct.

Answer 3

I would do it similar to Elana G, except I'd do it this way.

 

y/2 + 7 =  -20 - 5

y/2  = -20 - 5 - 7 = -32

y = -32 * 2 = -64

 

So I'd move the 7 by switching the sign and adding it, and finally I'd move the /2  (which is really a *1/2) by inverting and multiplying.

 

When you move addition, you switch sign, when you move multiplication you flip. These are called inverses. Addative inverse is just switching the sign, the multiplicative inverse is flipping, so the multiplicative inverse of 7 is 1/7.

 

Based on the order of operations, you *always* want to moveaddition *before* you move multiplication.

 

Hope that helps.