9x - 7 = 29
move -7 to the other side
sign changes from -7 to +7
9x-7+7= 29+7
9x= 29+7
9x= 36
divide by 9 for both sides
9x/9= 36/9
Answer: x= 4
Add 7 to both sides.
9x - 7 + 7 = 29 + 7
9x - 0 = 36
9x = 36
Divide both sides by 9.
9x/9 = 36/9
x = 4
Done.
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