If the first step in the solution of the equation -9 + x = 5x - 7 is "subtract x," then what would the next step be ?
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Remember you can do anything to an equation as long as you do it to both sides
17-9x=-3+16x
add 9x to both sides
17=-3+25x
add 3 to both sides
20=25x
divide both sides by 25
17-9x=-3+16x
add 9x to both sides
17=-3+25x
add 3 to both sides
20=25x
divide both sides by 25