12x + 6=9x + 27
12x-9x + 6=9x - 9x + 27 subtract 9x from both sides.
3x + 6 = 27 simplify
3x + 6 - 6=27 - 6 subtract 6 from both sides.
3x=21 simplify
3x/3=21/3 divide both sides by 3
x=7 simplify
12(7) + 6=>84+6=>90
9(7) + 27=>63+27=>90
It checks out!
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no
x = 5
9x+6 = 6x+15 9x-6x = 15-6 3x = 9 x = 3
no
Presumably this is a quadratic equation question in the form of: 9x2-12x+4 = 0 When factored: (3x-2)(3x-2) = 0 Solution: x = 2/3 and also x = 2/3 (they both have equal roots)