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Vanyuwa [196]
3 years ago
13

What is the answer 12x-9-3x=72

Mathematics
2 answers:
Anna71 [15]3 years ago
8 0
12x-9-3x=72
9x-9=72
9x-9+9=72+9
9x=81
9x/9=81/9
x=9
goldfiish [28.3K]3 years ago
6 0
Work:
12x-9-3x=72
combine like terms: 12x +(-3x)
9x-9=72
add 9 to both sides
9x=81
divide by 9 on both sides
x=9

Answer:
x=9
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