Answer:
Explanation:
1+9x = 80
9x = 80-1
9x = 79
x = 79/9
or
x = 8 7/9
x ≈ 8.78 (x = about 8.78) rounded
79/9 or 8 7/9
1+9x=80
1 +9x = 90
Subtract 1 from each side
1+9x-1 = 80-1
divide by 9
9x/9 = 79/9
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