How to solve this equation 5x-2 (7x+1)=14x

Distribute the -2 to the 7x and 1 to get -14x and -2. Combine the 5x and -14x to get 19x. Then combine 19x and 14x. Then divide and solve for x. Sorry if this is wrong I did this all mentally lol

5x -2(7x + 1) = 14x              Multiply out

5x - 2*7x - 2*1 = 14x         

5x - 14x - 2 = 14x              

14x crosses over to other side to become -14x, and -2 crosses over to become +2

5x - 14x - 14x = 2

5x - 28x = 2

-23x = 2

x = 2/-23

x = -2/23

Hope this explains it.

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)