Hey, can anyone help me with this? Okay, so in the equation 10 + 3x= -17 . The answer or (x) = -9 because you minus 10 on both sides then, you add 17 + 10 and get -27 then you have to divide and 3 and 4 cross out, and 21 divided by 3 is -9. Can someone please tell me why you add for the -17 part in the equation !!!

Question

13-02-2020
Mathematics

contestada

Hey, can anyone help me with this? Okay, so in the equation 10 + 3x= -17 . The answer or (x) = -9 because you minus 10 on both sides then, you add 17 + 10 and get -27 then you have to divide and 3 and 4 cross out, and 21 divided by 3 is -9. Can someone please tell me why you add for the -17 part in the equation !!!

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sifzrosarymariah sifzrosarymariah · Answer 1 · 2020-02-13T06:35:47+01:00

Answer:

You do -17 + -10 inorder to change the operation used because both negatives does not mathematically look nice.

Step-by-step explanation:

To isolate the unknown, we need to move all the numbers on one side of the equal sign and all the unknow variables on one side.

Here we move 10 on the other side by taking away 10 both sides

10 + 3x = -17

-10 -10

then we are left with only 3x on one side and -27 on the other side because -17 - -10 = -27 , in this case it is acknowledge to change the operation from minus to add because the two minus are together, so we say -17 + -10 .

3x = -27

/3 /3

x = -9