50pts and brainliest to whoever can solve this problem TWO ways: 3/7(x + 9)=12, 3/7 being a fraction

Mathematics

1 answer:

Mnenie [13.5K]3 years ago

7 0

x = 19

Step-by-step explanation:

$\begin{aligned}\frac{3}{7}\left(x+9\right)&=12\\3\left(x+9\right)&=12\times 7\\3x+27&=84\\3x&=84-27\\3x&=57\\x&=\frac{57}{3}\\ x&=\underline{\underline{\bf 19}}\end{aligned}$

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