punruh091
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What is the most efficient first step to isolate the variable term on one side of this equation? -9x = -4x + 5

A. Subtract 5 from both sides.
B. Add 5 to both sides.
C. Subtract 9x from both sides.
D. Add 4x to both sides.

Respuesta :

Eureka1Fa

D. Add 4x to both sides gets all of x on one side with the solution on the other side.

frika

The most efficient 1st step to solve this equation is to add 4x to both sides of equation, then you get

[tex]-9x+4x=-4x+4x+5,\\ \\-5x=5.[/tex]

This equation you can solve by dividing the whole equation by (-5):

[tex]x=5:(-5),\\ \\x=-1.[/tex]

Answer: option D.

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