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7\left(1\times 5+2\right)+5\left(3\times 7+6\right)=5\times 35+9
Multiply both sides of the equation by 35, the least common multiple of 5,7,35.
7\left(5+2\right)+5\left(3\times 7+6\right)=5\times 35+9
Multiply 1 and 5 to get 5.
7\times 7+5\left(3\times 7+6\right)=5\times 35+9
Add 5 and 2 to get 7.
49+5\left(3\times 7+6\right)=5\times 35+9
Multiply 7 and 7 to get 49.
49+5\left(21+6\right)=5\times 35+9
Multiply 3 and 7 to get 21.
49+5\times 27=5\times 35+9
Add 21 and 6 to get 27.
49+135=5\times 35+9
Multiply 5 and 27 to get 135.
184=5\times 35+9
Add 49 and 135 to get 184.
184=175+9
Multiply 5 and 35 to get 175.
184=184
Add 175 and 9 to get 184.
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Compare 184 and 184.
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