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140+130\left(3\times 2+7\right)=91
Multiply both sides of the equation by 260, the least common multiple of 13,2,20.
140+130\left(6+7\right)=91
Multiply 3 and 2 to get 6.
140+130\times 13=91
Add 6 and 7 to get 13.
140+1690=91
Multiply 130 and 13 to get 1690.
1830=91
Add 140 and 1690 to get 1830.
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Compare 1830 and 91.
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