Solve for y
y = \frac{365}{204} = 1\frac{161}{204} \approx 1.789215686
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12\left(3\times 5+2\right)y+15\left(1\times 4+1\right)=20\left(7\times 3+1\right)
Multiply both sides of the equation by 60, the least common multiple of 5,4,3.
12\left(15+2\right)y+15\left(1\times 4+1\right)=20\left(7\times 3+1\right)
Multiply 3 and 5 to get 15.
12\times 17y+15\left(1\times 4+1\right)=20\left(7\times 3+1\right)
Add 15 and 2 to get 17.
204y+15\left(1\times 4+1\right)=20\left(7\times 3+1\right)
Multiply 12 and 17 to get 204.
204y+15\left(4+1\right)=20\left(7\times 3+1\right)
Multiply 1 and 4 to get 4.
204y+15\times 5=20\left(7\times 3+1\right)
Add 4 and 1 to get 5.
204y+75=20\left(7\times 3+1\right)
Multiply 15 and 5 to get 75.
204y+75=20\left(21+1\right)
Multiply 7 and 3 to get 21.
204y+75=20\times 22
Add 21 and 1 to get 22.
204y+75=440
Multiply 20 and 22 to get 440.
204y=440-75
Subtract 75 from both sides.
204y=365
Subtract 75 from 440 to get 365.
y=\frac{365}{204}
Divide both sides by 204.
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