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2\times 10+1+4\times 10+9+7=8\times 10+7
Multiply both sides of the equation by 10.
20+1+4\times 10+9+7=8\times 10+7
Multiply 2 and 10 to get 20.
21+4\times 10+9+7=8\times 10+7
Add 20 and 1 to get 21.
21+40+9+7=8\times 10+7
Multiply 4 and 10 to get 40.
61+9+7=8\times 10+7
Add 21 and 40 to get 61.
70+7=8\times 10+7
Add 61 and 9 to get 70.
77=8\times 10+7
Add 70 and 7 to get 77.
77=80+7
Multiply 8 and 10 to get 80.
77=87
Add 80 and 7 to get 87.
\text{false}
Compare 77 and 87.
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