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70x+6\times 14+3=2\left(12\times 7+2\right)
Multiply both sides of the equation by 14, the least common multiple of 14,7.
70x+84+3=2\left(12\times 7+2\right)
Multiply 6 and 14 to get 84.
70x+87=2\left(12\times 7+2\right)
Add 84 and 3 to get 87.
70x+87=2\left(84+2\right)
Multiply 12 and 7 to get 84.
70x+87=2\times 86
Add 84 and 2 to get 86.
70x+87=172
Multiply 2 and 86 to get 172.
70x=172-87
Subtract 87 from both sides.
70x=85
Subtract 87 from 172 to get 85.
x=\frac{85}{70}
Divide both sides by 70.
x=\frac{17}{14}
Reduce the fraction \frac{85}{70} to lowest terms by extracting and canceling out 5.