Question

i know that the ans is -24 ... can anyone say that why minus symbol comes there . with the solved equation​

Answer 1

Answer:

7x-4-8x=20

-x=24

X=-24

as the symbol of -x comes the other side so it becomes -24.

Answer 2

In linear equation we multiply -1 from both side

in this situation it is always follow

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hope is help